Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
7 × 10 = ______
5 × 10 = ______
40 + 10 = ______
75 − 10 = ______
35 + 20 = ______
69 − 10 = ______
13 + 20 = ______
21 + 20 = ______
65 − 10 = ______
2 × 10 = ______
83 + 10 = ______
25 + 20 = ______
16 + 20 = ______
31 − 10 = ______
47 + 20 = ______
18 + 20 = ______
45 + 20 = ______
36 − 10 = ______
4 × 10 = ______
14 + 20 = ______
