| Name: ______________________________ | Date: ______________ |
Instructions
- Add or subtract carefully.
- Show your thinking when you can.
- Read each question and check your answer.
- Have fun helping the friendly space crew!
Example: A rocket has 24 fuel crystals and collects 13 more. How many fuel crystals does it have? 24 + 13 = 37.
Answer: 37 fuel crystals
Part 1: Rocket Launch
Find each missing number.
1. 15 + 7 = __________
2. 32 - 9 = __________
3. 46 + 8 = __________
4. 71 - 30 = __________
5. 28 + 25 = __________
Part 2: Alien Supplies
Choose the correct answer.
6. What is 39 + 6?
| ○ A. 43 | ○ B. 45 |
| ○ C. 46 | ○ D. 49 |
7. What is 64 - 18?
| ○ A. 36 | ○ B. 44 |
| ○ C. 46 | ○ D. 52 |
8. What is 27 + 34?
| ○ A. 51 | ○ B. 59 |
| ○ C. 61 | ○ D. 71 |
9. What is 90 - 47?
| ○ A. 33 | ○ B. 43 |
| ○ C. 47 | ○ D. 53 |
Part 3: Moon Math Check
Write True if the number sentence is correct or False if it is not.
10. 18 + 16 = 34 True / False
11. fifty minus 23 equals 37 True / False
12. 42 + 29 = 71 True / False
13. 83 - 35 = 58 True / False
14. 67 - 19 = 48 True / False
Part 4: Comet Missions
Solve each space mission problem.
15. A comet collector found 26 shiny rocks in the morning and 18 in the afternoon. How many rocks did the collector find altogether? Answer: __________ rocks |
16. A space station had 75 oxygen packs. The crew used 29 packs. How many packs are left? Answer: __________ oxygen packs |
17. There are 34 moon bugs in one crater and 27 in another crater. How many moon bugs are there in all? Answer: __________ moon bugs |
18. A robot carried 82 tools and gave 36 tools to the space crew. How many tools does the robot have now? Answer: __________ tools |
Part 5: Captain's Challenge (optional challenge)
Solve the problem and explain your strategy in a few words.
19. Which is greater: 48 + 27 or 96 - 19? Find both answers and compare them. |
20. A galaxy map has 100 stars. A crew visits 38 stars, then visits 24 more. How many stars have not been visited? |
21. Write a different addition sentence that equals 50. |
Answer Key
| 1. | 22 |
| 2. | 23 |
| 3. | 54 |
| 4. | 41 |
| 5. | 53 |
| 6. | B (45) |
| 7. | C (46) |
| 8. | C (61) |
| 9. | B (43) |
| 10. | True |
| 11. | False |
| 12. | True |
| 13. | False |
| 14. | True |
| 15. | 44 rocks |
| 16. | 46 oxygen packs |
| 17. | 61 moon bugs |
| 18. | 46 tools |
| 19. | 48 + 27 = 75 and 96 - 19 = 77, so 96 - 19 is greater by 2. |
| 20. | 38 + 24 = 62, and 100 - 62 = 38. There are 38 stars left. |
| 21. | Answers will vary. One example is 23 + 27 = 50. |