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
21 + 20 = ______
77 − 10 = ______
42 − 10 = ______
2 × 10 = ______
37 + 20 = ______
67 − 10 = ______
89 + 10 = ______
9 × 10 = ______
3 × 10 = ______
11 + 10 = ______
40 + 10 = ______
4 × 10 = ______
78 + 20 = ______
31 − 10 = ______
84 + 20 = ______
48 + 20 = ______
18 + 20 = ______
51 − 10 = ______
68 + 20 = ______
79 + 20 = ______
