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
99 − 10 = ______
89 + 20 = ______
83 − 10 = ______
4 × 10 = ______
7 × 10 = ______
67 + 10 = ______
27 − 10 = ______
45 + 20 = ______
8 × 10 = ______
41 + 20 = ______
51 + 10 = ______
64 + 20 = ______
25 + 20 = ______
6 × 10 = ______
28 + 10 = ______
35 + 20 = ______
21 + 10 = ______
30 + 10 = ______
21 + 20 = ______
72 + 10 = ______
