Mental Math Worksheet
Recommended for 1st Grade — 5th Grade
Mental Math Worksheet
Name: ____________________Date: ____________
Instructions: Using mental strategies like making ten, doubling, and compensation to compute quickly.
20 problems
39 + 20 = ______
81 + 20 = ______
5 × 10 = ______
21 − 10 = ______
4 × 10 = ______
51 + 10 = ______
9 × 10 = ______
6 × 10 = ______
25 + 10 = ______
89 − 10 = ______
66 + 20 = ______
40 + 10 = ______
82 + 10 = ______
27 − 10 = ______
71 + 20 = ______
3 × 10 = ______
82 + 20 = ______
69 + 10 = ______
55 + 10 = ______
68 − 10 = ______
