Double-Digit Addition - Free Worksheet for Kids - SKOOLGO - Free Printable
Educational worksheet: Double-Digit Addition - Free Worksheet for Kids - SKOOLGO. Download and print for classroom or home learning activities.
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Step-by-step solution for: Double-Digit Addition - Free Worksheet for Kids - SKOOLGO
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Show Answer Key & Explanations
Step-by-step solution for: Double-Digit Addition - Free Worksheet for Kids - SKOOLGO
Here are the solutions for the double-digit addition problems. I have calculated each sum step-by-step to ensure accuracy.
Step-by-Step Calculations:
1. 45 + 98:
* Ones place: $5 + 8 = 13$ (write down 3, carry over 1)
* Tens place: $4 + 9 + 1 \text{ (carry)} = 14$
* Result: 143
2. 12 + 33:
* Ones place: $2 + 3 = 5$
* Tens place: $1 + 3 = 4$
* Result: 45
3. 52 + 28:
* Ones place: $2 + 8 = 10$ (write down 0, carry over 1)
* Tens place: $5 + 2 + 1 \text{ (carry)} = 8$
* Result: 80
4. 19 + 66:
* Ones place: $9 + 6 = 15$ (write down 5, carry over 1)
* Tens place: $1 + 6 + 1 \text{ (carry)} = 8$
* Result: 85
5. 47 + 39:
* Ones place: $7 + 9 = 16$ (write down 6, carry over 1)
* Tens place: $4 + 3 + 1 \text{ (carry)} = 8$
* Result: 86
6. 91 + 78:
* Ones place: $1 + 8 = 9$
* Tens place: $9 + 7 = 16$
* Result: 169
7. 21 + 89:
* Ones place: $1 + 9 = 10$ (write down 0, carry over 1)
* Tens place: $2 + 8 + 1 \text{ (carry)} = 11$
* Result: 110
8. 15 + 55:
* Ones place: $5 + 5 = 10$ (write down 0, carry over 1)
* Tens place: $1 + 5 + 1 \text{ (carry)} = 7$
* Result: 70
9. 67 + 23:
* Ones place: $7 + 3 = 10$ (write down 0, carry over 1)
* Tens place: $6 + 2 + 1 \text{ (carry)} = 9$
* Result: 90
10. 27 + 21:
* Ones place: $7 + 1 = 8$
* Tens place: $2 + 2 = 4$
* Result: 48
11. 55 + 79:
* Ones place: $5 + 9 = 14$ (write down 4, carry over 1)
* Tens place: $5 + 7 + 1 \text{ (carry)} = 13$
* Result: 134
12. 84 + 14:
* Ones place: $4 + 4 = 8$
* Tens place: $8 + 1 = 9$
* Result: 98
13. 46 + 46:
* Ones place: $6 + 6 = 12$ (write down 2, carry over 1)
* Tens place: $4 + 4 + 1 \text{ (carry)} = 9$
* Result: 92
14. 93 + 95:
* Ones place: $3 + 5 = 8$
* Tens place: $9 + 9 = 18$
* Result: 188
15. 88 + 55:
* Ones place: $8 + 5 = 13$ (write down 3, carry over 1)
* Tens place: $8 + 5 + 1 \text{ (carry)} = 14$
* Result: 143
16. 22 + 47:
* Ones place: $2 + 7 = 9$
* Tens place: $2 + 4 = 6$
* Result: 69
17. 47 + 13:
* Ones place: $7 + 3 = 10$ (write down 0, carry over 1)
* Tens place: $4 + 1 + 1 \text{ (carry)} = 6$
* Result: 60
18. 52 + 36:
* Ones place: $2 + 6 = 8$
* Tens place: $5 + 3 = 8$
* Result: 88
19. 87 + 31:
* Ones place: $7 + 1 = 8$
* Tens place: $8 + 3 = 11$
* Result: 118
20. 76 + 39:
* Ones place: $6 + 9 = 15$ (write down 5, carry over 1)
* Tens place: $7 + 3 + 1 \text{ (carry)} = 11$
* Result: 115
21. 37 + 67:
* Ones place: $7 + 7 = 14$ (write down 4, carry over 1)
* Tens place: $3 + 6 + 1 \text{ (carry)} = 10$
* Result: 104
22. 19 + 29:
* Ones place: $9 + 9 = 18$ (write down 8, carry over 1)
* Tens place: $1 + 2 + 1 \text{ (carry)} = 4$
* Result: 48
23. 41 + 51:
* Ones place: $1 + 1 = 2$
* Tens place: $4 + 5 = 9$
* Result: 92
24. 74 + 38:
* Ones place: $4 + 8 = 12$ (write down 2, carry over 1)
* Tens place: $7 + 3 + 1 \text{ (carry)} = 11$
* Result: 112
25. 58 + 95:
* Ones place: $8 + 5 = 13$ (write down 3, carry over 1)
* Tens place: $5 + 9 + 1 \text{ (carry)} = 15$
* Result: 153
Final Answer:
1) 143
2) 45
3) 80
4) 85
5) 86
6) 169
7) 110
8) 70
9) 90
10) 48
11) 134
12) 98
13) 92
14) 188
15) 143
16) 69
17) 60
18) 88
19) 118
20) 115
21) 104
22) 48
23) 92
24) 112
25) 153
Step-by-Step Calculations:
1. 45 + 98:
* Ones place: $5 + 8 = 13$ (write down 3, carry over 1)
* Tens place: $4 + 9 + 1 \text{ (carry)} = 14$
* Result: 143
2. 12 + 33:
* Ones place: $2 + 3 = 5$
* Tens place: $1 + 3 = 4$
* Result: 45
3. 52 + 28:
* Ones place: $2 + 8 = 10$ (write down 0, carry over 1)
* Tens place: $5 + 2 + 1 \text{ (carry)} = 8$
* Result: 80
4. 19 + 66:
* Ones place: $9 + 6 = 15$ (write down 5, carry over 1)
* Tens place: $1 + 6 + 1 \text{ (carry)} = 8$
* Result: 85
5. 47 + 39:
* Ones place: $7 + 9 = 16$ (write down 6, carry over 1)
* Tens place: $4 + 3 + 1 \text{ (carry)} = 8$
* Result: 86
6. 91 + 78:
* Ones place: $1 + 8 = 9$
* Tens place: $9 + 7 = 16$
* Result: 169
7. 21 + 89:
* Ones place: $1 + 9 = 10$ (write down 0, carry over 1)
* Tens place: $2 + 8 + 1 \text{ (carry)} = 11$
* Result: 110
8. 15 + 55:
* Ones place: $5 + 5 = 10$ (write down 0, carry over 1)
* Tens place: $1 + 5 + 1 \text{ (carry)} = 7$
* Result: 70
9. 67 + 23:
* Ones place: $7 + 3 = 10$ (write down 0, carry over 1)
* Tens place: $6 + 2 + 1 \text{ (carry)} = 9$
* Result: 90
10. 27 + 21:
* Ones place: $7 + 1 = 8$
* Tens place: $2 + 2 = 4$
* Result: 48
11. 55 + 79:
* Ones place: $5 + 9 = 14$ (write down 4, carry over 1)
* Tens place: $5 + 7 + 1 \text{ (carry)} = 13$
* Result: 134
12. 84 + 14:
* Ones place: $4 + 4 = 8$
* Tens place: $8 + 1 = 9$
* Result: 98
13. 46 + 46:
* Ones place: $6 + 6 = 12$ (write down 2, carry over 1)
* Tens place: $4 + 4 + 1 \text{ (carry)} = 9$
* Result: 92
14. 93 + 95:
* Ones place: $3 + 5 = 8$
* Tens place: $9 + 9 = 18$
* Result: 188
15. 88 + 55:
* Ones place: $8 + 5 = 13$ (write down 3, carry over 1)
* Tens place: $8 + 5 + 1 \text{ (carry)} = 14$
* Result: 143
16. 22 + 47:
* Ones place: $2 + 7 = 9$
* Tens place: $2 + 4 = 6$
* Result: 69
17. 47 + 13:
* Ones place: $7 + 3 = 10$ (write down 0, carry over 1)
* Tens place: $4 + 1 + 1 \text{ (carry)} = 6$
* Result: 60
18. 52 + 36:
* Ones place: $2 + 6 = 8$
* Tens place: $5 + 3 = 8$
* Result: 88
19. 87 + 31:
* Ones place: $7 + 1 = 8$
* Tens place: $8 + 3 = 11$
* Result: 118
20. 76 + 39:
* Ones place: $6 + 9 = 15$ (write down 5, carry over 1)
* Tens place: $7 + 3 + 1 \text{ (carry)} = 11$
* Result: 115
21. 37 + 67:
* Ones place: $7 + 7 = 14$ (write down 4, carry over 1)
* Tens place: $3 + 6 + 1 \text{ (carry)} = 10$
* Result: 104
22. 19 + 29:
* Ones place: $9 + 9 = 18$ (write down 8, carry over 1)
* Tens place: $1 + 2 + 1 \text{ (carry)} = 4$
* Result: 48
23. 41 + 51:
* Ones place: $1 + 1 = 2$
* Tens place: $4 + 5 = 9$
* Result: 92
24. 74 + 38:
* Ones place: $4 + 8 = 12$ (write down 2, carry over 1)
* Tens place: $7 + 3 + 1 \text{ (carry)} = 11$
* Result: 112
25. 58 + 95:
* Ones place: $8 + 5 = 13$ (write down 3, carry over 1)
* Tens place: $5 + 9 + 1 \text{ (carry)} = 15$
* Result: 153
Final Answer:
1) 143
2) 45
3) 80
4) 85
5) 86
6) 169
7) 110
8) 70
9) 90
10) 48
11) 134
12) 98
13) 92
14) 188
15) 143
16) 69
17) 60
18) 88
19) 118
20) 115
21) 104
22) 48
23) 92
24) 112
25) 153
Parent Tip: Review the logic above to help your child master the concept of free two digit addition worksheet.
