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
70 + 20 = ______
63 − 10 = ______
42 − 10 = ______
86 + 20 = ______
39 − 10 = ______
21 + 20 = ______
86 + 10 = ______
41 − 10 = ______
8 × 10 = ______
79 − 10 = ______
57 − 10 = ______
63 + 20 = ______
69 + 20 = ______
67 + 20 = ______
85 + 20 = ______
29 − 10 = ______
35 + 10 = ______
42 + 20 = ______
49 + 20 = ______
89 + 20 = ______
