Addition within twenty
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. 9 + 5 = ?
2. 9 + 6 = ?
3. 8 + 8 = ?
4. 7 + 5 = ?
5. 8 + 5 = ?
Answer key ยท Addition within twenty
1. 14
Fill the first ten-frame: move 1 counter across from the second frame.
The first frame now holds 10, and 4 are left in the second frame.
10 + 4 = 14.
2. 15
Fill the first ten-frame: move 1 counter across from the second frame.
The first frame now holds 10, and 5 are left in the second frame.
10 + 5 = 15.
3. 16
Fill the first ten-frame: move 2 counters across from the second frame.
The first frame now holds 10, and 6 are left in the second frame.
10 + 6 = 16.
4. 12
Fill the first ten-frame: move 3 counters across from the second frame.
The first frame now holds 10, and 2 are left in the second frame.
10 + 2 = 12.
5. 13
Fill the first ten-frame: move 2 counters across from the second frame.
The first frame now holds 10, and 3 are left in the second frame.
10 + 3 = 13.
Try it together
Find 15 buttons or blocks. Make two groups, then move some to make a group of ten. Explain what is left.