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
71 + 20 = ______
42 + 20 = ______
47 − 10 = ______
24 − 10 = ______
89 − 10 = ______
77 − 10 = ______
46 + 10 = ______
40 + 10 = ______
65 + 10 = ______
19 + 20 = ______
61 − 10 = ______
3 × 10 = ______
26 + 20 = ______
58 + 10 = ______
82 − 10 = ______
57 + 10 = ______
47 + 10 = ______
17 + 10 = ______
2 × 10 = ______
87 + 20 = ______
