Let's solve each problem step by step:
Problem 1: 3 more than 7 is ______.
- "More than" means addition.
- Calculation: \( 7 + 3 = 10 \)
- Answer:
10
Problem 2: 12 more than 3 is ______.
- "More than" means addition.
- Calculation: \( 3 + 12 = 15 \)
- Answer:
15
Problem 3: 5 less than 11 is ______.
- "Less than" means subtraction.
- Calculation: \( 11 - 5 = 6 \)
- Answer:
6
Problem 4: 7 less than 20 is ______.
- "Less than" means subtraction.
- Calculation: \( 20 - 7 = 13 \)
- Answer:
13
Problem 5: 9 less than ______ is 2.
- Let the missing number be \( x \).
- The problem states: \( x - 9 = 2 \).
- Solve for \( x \): \( x = 2 + 9 = 11 \)
- Answer:
11
Problem 6: 15 less than ______ is 8.
- Let the missing number be \( x \).
- The problem states: \( x - 15 = 8 \).
- Solve for \( x \): \( x = 8 + 15 = 23 \)
- Answer:
23
Problem 7: ______ more than 15 is 18.
- Let the missing number be \( x \).
- The problem states: \( 15 + x = 18 \).
- Solve for \( x \): \( x = 18 - 15 = 3 \)
- Answer:
3
Problem 8: ______ more than 9 is 15.
- Let the missing number be \( x \).
- The problem states: \( 9 + x = 15 \).
- Solve for \( x \): \( x = 15 - 9 = 6 \)
- Answer:
6
Problem 9: ______ less than 17 is 5.
- Let the missing number be \( x \).
- The problem states: \( 17 - x = 5 \).
- Solve for \( x \): \( x = 17 - 5 = 12 \)
- Answer:
12
Problem 10: ______ less than 9 is 3.
- Let the missing number be \( x \).
- The problem states: \( 9 - x = 3 \).
- Solve for \( x \): \( x = 9 - 3 = 6 \)
- Answer:
6
Final Answers:
1.
10
2.
15
3.
6
4.
13
5.
11
6.
23
7.
3
8.
6
9.
12
10.
6
Boxed Final Answer:
\[
\boxed{10, 15, 6, 13, 11, 23, 3, 6, 12, 6}
\]
Parent Tip: Review the logic above to help your child master the concept of less than worksheet.
