Here are the solutions for each problem on the worksheet. I have solved them step-by-step and checked the work as instructed.
1. Problem: $89 - 45$
*
Solve:
* Ones place: $9 - 5 = 4$
* Tens place: $8 - 4 = 4$
* Answer:
44
*
Check with addition:
* $44 + 45 = 89$ (Correct)
2. Problem: $96 + 45$
*
Solve:
* Ones place: $6 + 5 = 11$ (Write down 1, carry over 1)
* Tens place: $9 + 4 + 1 \text{ (carry)} = 14$
* Answer:
141
*
Check with subtraction:
* $141 - 45 = 96$ (Correct)
3. Problem: $64 - 15$
*
Solve:
* Ones place: You cannot subtract 5 from 4. Borrow 1 from the tens place. The 6 becomes 5, and the 4 becomes 14.
* $14 - 5 = 9$
* Tens place: $5 - 1 = 4$
* Answer:
49
*
Check with addition:
* $49 + 15 = 64$ (Correct)
4. Problem: $65 + 39$
*
Solve:
* Ones place: $5 + 9 = 14$ (Write down 4, carry over 1)
* Tens place: $6 + 3 + 1 \text{ (carry)} = 10$
* Answer:
104
*
Check with subtraction:
* $104 - 39 = 65$ (Correct)
5. Problem: $75 - 24$
*
Solve:
* Ones place: $5 - 4 = 1$
* Tens place: $7 - 2 = 5$
* Answer:
51
*
Check with addition:
* $51 + 24 = 75$ (Correct)
6. Problem: $20 + 34$
*
Solve:
* Ones place: $0 + 4 = 4$
* Tens place: $2 + 3 = 5$
* Answer:
54
*
Check with subtraction:
* $54 - 34 = 20$ (Correct)
7. Problem: $109 - 58$
*
Solve:
* Ones place: $9 - 8 = 1$
* Tens place: You cannot subtract 5 from 0. Borrow 1 from the hundreds place. The 1 becomes 0, and the 0 becomes 10.
* $10 - 5 = 5$
* Hundreds place: 0 remains.
* Answer:
51
*
Check with addition:
* $51 + 58 = 109$ (Correct)
8. Problem: $124 + 49$
*
Solve:
* Ones place: $4 + 9 = 13$ (Write down 3, carry over 1)
* Tens place: $2 + 4 + 1 \text{ (carry)} = 7$
* Hundreds place: $1 + 0 = 1$
* Answer:
173
*
Check with subtraction:
* $173 - 49 = 124$ (Correct)
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Final Answer:
1.
44
2.
141
3.
49
4.
104
5.
51
6.
54
7.
51
8.
173
Parent Tip: Review the logic above to help your child master the concept of subtraction worksheet check with.
