I will solve this "Rock Star Addition" worksheet, which involves 2-digit addition with regrouping. I'll go through each problem one by one to find the sum.
First, let me look at the problems in the first row:
1. 27 + 40 + 13
2. 22 + 40 + 18
3. 11 + 19 + 42
I'll start with problem 1: 27 + 40 + 13.
Adding these together: 27 + 40 = 67, then 67 + 13 = 80.
Problem 2: 22 + 40 + 18.
22 + 40 = 62, then 62 + 18 = 80.
Problem 3: 11 + 19 + 42.
11 + 19 = 30, then 30 + 42 = 72.
Now, let's move to the second row:
4. 55 + 28 + 13
5. 62 + 15 + 18
6. 48 + 13 + 11
Problem 4: 55 + 28 + 13.
55 + 28 = 83, then 83 + 13 = 96.
Problem 5: 62 + 15 + 18.
62 + 15 = 77, then 77 + 18 = 95.
Problem 6: 48 + 13 + 11.
48 + 13 = 61, then 61 + 11 = 72.
Third row:
7. 16 + 26 + 10
8. 70 + 19 + 12
9. 45 + 33 + 18
Problem 7: 16 + 26 + 10.
16 + 26 = 42, then 42 + 10 = 52.
Problem 8: 70 + 19 + 12.
70 + 19 = 89, then 89 + 12 = 101.
Problem 9: 45 + 33 + 18.
45 + 33 = 78, then 78 + 18 = 96.
Fourth row:
10. 13 + 65 + 14
11. 22 + 45 + 23
12. 46 + 22 + 14
Problem 10: 13 + 65 + 14.
13 + 65 = 78, then 78 + 14 = 92.
Problem 11: 22 + 45 + 23.
22 + 45 = 67, then 67 + 23 = 90.
Problem 12: 46 + 22 + 14.
46 + 22 = 68, then 68 + 14 = 82.
Fifth row:
13. 52 + 33 + 17
14. 37 + 40 + 16
15. 29 + 10 + 33
Problem 13: 52 + 33 + 17.
52 + 33 = 85, then 85 + 17 = 102.
Problem 14: 37 + 40 + 16.
37 + 40 = 77, then 77 + 16 = 93.
Problem 15: 29 + 10 + 33.
29 + 10 = 39, then 39 + 33 = 72.
Here are the solutions for all 15 problems:
1. 80
2. 80
3. 72
4. 96
5. 95
6. 72
7. 52
8. 101
9. 96
10. 92
11. 90
12. 82
13. 102
14. 93
15. 72
Parent Tip: Review the logic above to help your child master the concept of grade 2 math worksheet.
