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Eureka Math Grade 1 Module 3 Lesson 9 Answer Key

Engage ny eureka math 1st grade module 3 lesson 9 answer key, eureka math grade 1 module 3 lesson 9 sprint answer key.

Question 1. 17 + 1 = ☐ Answer: 18

Explanation: To add the numbers, add first the one’s place digit. (7+1=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 2. 15 + 1 = ☐ Answer: 16

Explanation: To add the numbers, add first the one’s place digit. (5+1=6). Now bring down one from ten’s place digit. Hence the answer is 16.

Question 3. 18 + 1 = ☐ Answer: 19

Explanation: To add the numbers, add first the one’s place digit. (8+1=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 4. 15 + 2 = ☐ Answer: 17

Explanation: To add the numbers, add first the one’s place digit. (5+2=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 5. 17 + 2 = ☐ Answer: 19

Explanation: To add the numbers, add first the one’s place digit. (7+2=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 6. 18 + 2 = ☐ Answer: 20

Explanation: To add the numbers, add first the one’s place digit. (8+2=0). Now bring down one from ten’s place digit. Hence the answer is 20.

Question 7. 15 + 3 = ☐ Answer: 18

Explanation: To add the numbers, add first the one’s place digit. (5+3=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 8. 5 + 13 = ☐ Answer: 18

Question 9. 15 + 2 = ☐ Answer: 17

Question 10. 5 + 12 = ☐ Answer: 17

Question 11. 12 + 4 = ☐ Answer: 16

Explanation: To add the numbers, add first the one’s place digit. (2+4=6). Now bring down one from ten’s place digit. Hence the answer is 16.

Question 12. 13 + 4 = ☐ Answer: 17

Explanation: To add the numbers, add first the one’s place digit. (3+4=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 13. 3 + 14 = ☐ Answer: 17

Question 14. 17 + 2 = ☐ Answer: 19

Question 15. 12 + 7 = ☐ Answer: 19

Explanation: To add the numbers, add first the one’s place digit. (2+7=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 16. 11 + 9 = ☐ Answer: 20

Explanation: To add the numbers, add first the one’s place digit. (1+9=10). Now bring down one from ten’s place digit. Hence the answer is 20.

Question 17. 10 + 9 = ☐ Answer: 19

Explanation: To add the numbers, add first the one’s place digit. (0+9=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 18. 9 + 9 = ☐ Answer: 18

Explanation: To add the numbers, add first the one’s place digit. (4+1=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 19. 7 + 9 = ☐ Answer: 16

Explanation: To add the numbers, add first the one’s place digit. (7+9=16). Now bring down one from ten’s place digit. Hence the answer is 16.

Question 20. 8 + 8 = ☐ Answer: 16

Explanation: To add the numbers, add first the one’s place digit. (8+8=16). Now bring down carry forward one from ten’s place digit. Hence the answer is 18.

Question 21. 7 + 8 = ☐ Answer: 15

Explanation: To add the numbers, add first the one’s place digit. (7+8=15). Now bring down carry forward one from ten’s place digit. Hence the answer is 18.

Question 22. 8 + 5 = ☐ Answer: 13

Explanation: To add the numbers, add first the one’s place digit. (8+5=13). Now bring down the carry forward one from ten’s place digit. Hence the answer is 13.

Question 23. 11 + 8 = ☐ Answer: 19

Explanation: To add the numbers, add first the one’s place digit. (1+8=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 24. 12 + ☐ = 17 Answer: 12+x=17 x=17-12 x=5

Explanation: First of all, move variable 12 to the right side and subtract it from 17. So the solution we get is 5.

Question 25. 14 + ☐ = 17 Answer: 14+x=17 x=17-14 x=3

Explanation: First, move the variable 14 to the right side and subtract it from 17. So the solution we get is 3.

Question 26. 8 + ☐ = 17 Answer: 8+x=17 x=17-8 x=9

Explanation: First, move the variable 8 to the right side and subtract it from17. So the solution we get is 9.

Question 27. ☐ + 7 = 16 Answer: x+7=16 x=16-7 x=9

Explanation: First move the variable 7 to the left side and subtract it from 16. So the solution we get is 9.

Question 28. ☐ + 7 = 15 Answer: 8 + 7 =15

Explanation: x+7=15 x=15-7 x=8. Hence the answer is 8

Question 29. 9 + 5 = 10 + ☐ Answer: 9+5 = 10+x 14 = 10+x 14-10 =x x=4

Explanation: First, rearrange the terms as 9+ 5=14. Now move the variable 10 to the left side and subtract it from 14. So the solution we get is 4

Question 30. 7 + 8 = ☐ + 9 Answer: 7+8 = 6+9

Explanation: First, rearrange the terms as 7+ 8=15. Now move the variable 9 to the left side and subtract it from 15. So the solution we get is 6 15 = x+9 15-9 = x x=6

Question 1. 14 + 1 = ☐ Answer: 15

Question 2. 16 + 1 = ☐ Answer: 17

Explanation: To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 3. 17 + 1 = ☐ Answer: 18

Question 4. 11 + 2 = ☐ Answer: 13

Explanation: To add the numbers, add first the one’s place digit. (1+1=2). Now bring down one from ten’s place digit. Hence the answer is 13.

Question 5. 15 + 2 = ☐ Answer: 17

Question 6. 17 + 2 = ☐ Answer: 19

Question 7. 15 + 4 = ☐ Answer: 19

Question 8. 4 + 15 = ☐ Answer: 19

Question 9. 15 + 3 = ☐ Answer: 18

Question 10. 5 + 13 = ☐ Answer: 18

Question 11. 13 + 4 = ☐ Answer: 17

Question 12. 14 + 4 = ☐ Answer: 18

Question 13. 4 + 14 = ☐ Answer: 18

Explanation: To add the numbers, add first the one’s place digit. (4+4=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 14. 16 + 3 = ☐ Answer: 19

Explanation: To add the numbers, add first the one’s place digit. (6+3=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 15. 13 + 6 = ☐ Answer: 19

Explanation: To add the numbers, add first the one’s place digit. (3+6=9). Now bring down one from ten’s place digit. Hence the answer is 17.

Explanation: To add the numbers, add first the one’s place digit. (1+9=0). Now add the carry forward 1+1 = 2 and bring down 2 from ten’s place digit. Hence the answer is 20

Question 18. 8 + 9 = ☐ Answer: 17

Explanation: Add both the numbers 8+9 =17.  Now bring down one from ten’s place digit. Hence the answer is 17.

Question 19. 9 + 9 = ☐ Answer: 18

Explanation: Add both the numbers 9+9 =18. Now bring down one from ten’s place digit. Hence the answer is 18.

Question 20. 9 + 8 = ☐ Answer: 17

Explanation: Add both the numbers 9+8 =17. Now bring down one from ten’s place digit. Hence the answer is 17.

Question 21. 8 + 8 = ☐ Answer: 16

Explanation: To add the numbers, add first the one’s place digit. (8+8=16). Now bring down one from ten’s place digit. Hence the answer is 16.

Explanation: To add the numbers, add first the one’s place digit. (8+5=13). Now bring down one from ten’s place digit. Hence the answer is 13.

Question 23. 11 + 7 = ☐ Answer: 18

Explanation: To add the numbers, add first the one’s place digit. (1+7=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 24. 12 + ☐ = 18 Answer: 12 + 6 = 18

Explanation: To add the numbers, add first the one’s place digit. (2+6=8). Now bring down one from ten’s place digit. Hence the answer is 18. 12+x =18 x =18-12 x=6

Question 25. 14 + ☐ = 18 Answer: 14 + 4 = 18

Explanation: First, rearrange the terms as 14+x=18. Now move variable 14 to the right side and subtract it from 18. So the solution we get is 4. 14+x=18 x = 18-14 x = 4

Question 26. 8 + ☐ = 18 Answer: 8 + 10 = 18

Explanation: First, rearrange the terms as 8 + x=18. Now move the variable 8 to the right side and subtract it from 18. So the solution we get is 10. 8 + x =18 x = 18-8 x = 10

Question 27. ☐ + 5 = 14 Answer: 9 + 5 = 14

Explanation: First, rearrange the terms as x+5=14. Now move variable 5 to the right side and subtract it from 14. So the solution we get is 9. x+5 =14 x =14 -5 x = 9

Question 28. ☐ + 6 = 15 Answer: 9 + 6 = 15 x + 6 =15 x =15-6 x = 9 First, rearrange the terms as x+6=15. Now move the variable 6 to the right side and subtract it from 15. So the solution we get is 9.

Question 29. 9 + 6 = 10 + ☐ Answer: 9 + 6 = 10 + 5

Explanation: Now, rearrange the terms as 9+5=10+x. Now add 9+5 i.e 14 and move variable 14 to the left side and subtract it from 10. The solution we get is 4. 9+6 = 10 + x 15 = 10+x 15-10 = x x = 5

Question 30. 6 + 7 = ☐ + 9 Answer: 6+7 = 4+9

Explanation: Now, rearrange the terms as 6+7= x+9. Now add 6+7 i.e 13 and move variable 13 to the left side and subtract it from 9. The solution we get is 4.

Eureka Math Grade 1 Module 3 Lesson 9 Problem Set Answer Key

Explanation: To measure the guitar length we have to use any object like a paper clip or a toothpick. By using that we can know the length of the guitar A i.e 4 units and Guitar B is 3 units in length. By observing their lengths carefully we would know that Guitar A is 1 unit longer than GuitarB.

Explanation: Here we have to measure both the objects in centimeter cubes. After measuring, the blue pen is 8 cm in length and the yellow pen is 10 cm in length. 

Question 3. How much longer is the yellow pen than the blue pen? The yellow pen is _________ centimeters longer than the blue pen. Answer: The yellow pen is 2 centimeters longer than the blue pen.

Explanation: We have already measured the lengths of each object in centimeter cubes. Therefore the yellow pen is 10 cm long in length and that the blue pen is 8 cm long. Hence by comparing both the length of the objects we could know that the yellow pen is 2 centimeters longer than the blue pen.

Question 4. How much shorter is the blue pen than the yellow pen? The blue pen is _________ centimeters shorter than the yellow pen. Answer: The blue pen is 2 centimeters shorter than the yellow pen.

Explanation: As we know the blue pen is 8 cm long and the yellow pen is 10 cm long. By comparing both the object values we could know that the blue pen is 2 cm shorter than the yellow pen i.e is 10-8 = 2 cm.

Use your centimeter cubes to model each problem. Then, solve by drawing a picture of your model and writing a number sentence and a statement. Question 5. Austin wants to make a train that is 13 centimeter cubes long. If his train is already 9 centimeter cubes long, how many more cubes does he need? Answer: Here Austin needs 4 more cubes.

Explanation: Check the below picture for a better understanding.

Question 6. Kea’s boat is 12 centimeters long, and Megan’s boat is 8 centimeters long. How much shorter is Megan’s boat than Kea’s boat? Answer: Megan’s boat is 4 cm shorter than Kea’s boat.

Question 7. Kim cuts a piece of ribbon for her mom that is 14 centimeters long. Her mom says the ribbon is 8 centimeters too long. How long should the ribbon be? Answer: The ribbon should be 6 cm long.

Question 8. The tail of Lee’s dog is 15 centimeters long. If the tail of Kit’s dog is 9 centimeters long, how much longer is the tail of Lee’s dog than the tail of Kit’s dog? Answer: The tail of lee’s dog is 6 cm longer than the tail of kit’s dog.

Eureka Math Grade 1 Module 3 Lesson 9 Exit Ticket Answer Key

Use your centimeter cubes to model the problem. Then, draw a picture of your model. Mona’s hair grew 7 centimeters. Claire’s hair grew 15 centimeters. How much less did Mona’s hair grow than Claire’s hair? Answer: Mona’s hair is 8 cm shorter than claire’s hair.

Eureka Math Grade 1 Module 3 Lesson 9 Homework Answer Key

Explanation: By observing the objects carefully in the given question Trophy A is 1 unit shorter than trophy B.

Question 2. Measure each object with centimeter cubes.

Explanation: By measuring each of the objects with centimeter cubes we got the values of red and green shovel as 6 cm and 8 cm.

Question 3. How much longer is the green shovel than the red shovel? The green shovel is _________ centimeters longer than the red shovel. Answer: The green shovel is 2 centimeters longer than the red shovel.

Explanation: As we know the values of both objects by just comparing them with one another we could know the green shovel is 2 cm longer than the red shovel.

Use your centimeter cubes to model each problem. Then, solve by drawing a picture of your model and writing a number sentence and a statement. Question 4. Susan grew 15 centimeters, and Tyler grew 11 centimeters. How much more did Susan grow than Tyler? Answer: Susan grew 4 cm more than Tyler.

Question 5. Bob’s straw is 13 centimeters long. If Tom’s straw is 6 centimeters long, how much shorter is Tom’s straw than Bob’s straw? Answer: Tom’s straw is 7 cm shorter than Bob’s straw.

Question 6. A purple card is 8 centimeters long. A red card is 12 centimeters long. How much longer is the red card than the purple card? Answer: The red card is 4 cm longer.

Question 7. Carl’s bean plant grew to be 9 centimeters tall. Dan’s bean plant grew to be 14 centimeters tall. How much taller is Dan’s plant than Carl’s plant? Answer: Dan’s plant is 5 cm taller.

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