Adding Tens
Add using mental math. 40 + 42 =
82
Add the hundreds. Use mental math. 170 + 400 =
570
Subtract using mental math. 86 - 24 =
62
5x3
15
Add the hundreds. Use mental math. 380 + 500 =
880
Solve: 53 - 13 =
10 x 8
80
Add using mental math. 135 + 40 =
175
Add the hundreds. Use mental math. 490 + 300
790
Solve: 100-92
11 x 3
33
Add using mental math. 250 + 19 =
269
Find the missing number. 530 + ____ = 1030
500
Solve: 82-53
29
8 x 7
56
Nellie had 114 rubber bands. Then she bought a pack of 30 rubber bands. How many rubber bands does Nellie have now?
144
800
Tad has 72 seashells. He loses 15 shells. How many seashells does Tad have left?
57
12 x 2
24