Grade 2 mental math test questions: Add or subtract 10

📚 Quick Study Guide

• ➕ Adding 10: When you add 10 to a number, the digit in the tens place increases by 1. For example, $23 + 10 = 33$.
• ➖ Subtracting 10: When you subtract 10 from a number, the digit in the tens place decreases by 1. For example, $47 - 10 = 37$.
• 🔢 Think of a Number Line: Imagine a number line. Adding 10 means moving 10 spaces to the right, and subtracting 10 means moving 10 spaces to the left.
• 💡 Tips: Adding 10 is the same as adding 1 ten. Subtracting 10 is the same as taking away 1 ten.

📝 Practice Quiz

1. What is $34 + 10$?
   1. 24
   2. 44
   3. 35
2. What is $67 - 10$?
   1. 57
   2. 77
   3. 66
3. What is $19 + 10$?
   1. 9
   2. 29
   3. 10
4. What is $82 - 10$?
   1. 92
   2. 72
   3. 81
5. What is $55 + 10$?
   1. 45
   2. 65
   3. 56
6. What is $91 - 10$?
   1. 81
   2. 101
   3. 90
7. What is $28 + 10$?
   1. 18
   2. 38
   3. 29