Let’s go through each addition problem one by one.
Left column (doubles):
- 1 + 1 = 2 → because one plus one makes two.
- 2 + 2 = 4 → two and two together make four.
- 3 + 3 = 6 → three added to itself is six.
- 4 + 4 = 8 → four times two is eight.
- 5 + 5 = 10 → five pairs of fingers make ten.
- 6 + 6 = 12 → six plus six equals twelve.
- 7 + 7 = 14 → seven doubled is fourteen.
- 8 + 8 = 16 → eight plus eight is sixteen.
- 9 + 9 = 18 → nine doubled is eighteen.
Right column (doubles plus one):
These are just the doubles from the left, but with one more added — so we take the answer from the left and add 1.
- 1 + 2 = 3 → same as 1+1=2, then +1 = 3.
- 2 + 3 = 5 → same as 2+2=4, then +1 = 5.
- 3 + 4 = 7 → same as 3+3=6, then +1 = 7.
- 4 + 5 = 9 → same as 4+4=8, then +1 = 9.
- 5 + 6 = 11 → same as 5+5=10, then +1 = 11.
- 6 + 7 = 13 → same as 6+6=12, then +1 = 13.
- 7 + 8 = 15 → same as 7+7=14, then +1 = 15.
- 8 + 9 = 17 → same as 8+8=16, then +1 = 17.
- 9 + 10 = 19 → same as 9+9=18, then +1 = 19.
All answers checked and verified.
Final Answer:
1 + 1 = 2
2 + 2 = 4
3 + 3 = 6
4 + 4 = 8
5 + 5 = 10
6 + 6 = 12
7 + 7 = 14
8 + 8 = 16
9 + 9 = 18
1 + 2 = 3
2 + 3 = 5
3 + 4 = 7
4 + 5 = 9
5 + 6 = 11
6 + 7 = 13
7 + 8 = 15
8 + 9 = 17
9 + 10 = 19
Parent Tip: Review the logic above to help your child master the concept of doubles plus one worksheet grade 2.
