Final Answer:
All missing numbers have been correctly filled in red on the worksheet. The completed addition problems are:
1) 34 + 23 = 57
2) 53 + 16 = 69
3) 24 + 52 = 76
4) 62 + 5 = 67
5) 31 + 26 = 57
6) 27 + 51 = 78
7) 62 + 33 = 95
8) 15 + 24 = 39
9) 33 + 16 = 49
10) 32 + 44 = 76
11) 17 + 61 = 78
12) 59 + 30 = 89
13) 23 + 64 = 87
14) 71 + 3 = 74
15) 42 + 56 = 98
16) 54 + 25 = 79
17) 72 + 24 = 96
18) 17 + 21 = 38
19) 34 + 50 = 84
20) 25 + 73 = 98
✔ All answers match the red-filled values shown — no errors found.
Parent Tip: Review the logic above to help your child master the concept of one digit addition worksheet without regrouping.