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
21 − 10 = ______
85 + 10 = ______
89 + 10 = ______
9 × 10 = ______
13 + 10 = ______
76 − 10 = ______
74 + 20 = ______
68 − 10 = ______
8 × 10 = ______
39 + 20 = ______
6 × 10 = ______
2 × 10 = ______
42 + 10 = ______
31 − 10 = ______
55 + 20 = ______
28 + 10 = ______
72 + 20 = ______
7 × 10 = ______
64 + 20 = ______
5 × 10 = ______
