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
79 + 20 = ______
55 + 20 = ______
4 × 10 = ______
39 + 20 = ______
31 − 10 = ______
86 + 10 = ______
1 × 10 = ______
85 + 20 = ______
64 − 10 = ______
20 + 10 = ______
39 − 10 = ______
7 × 10 = ______
41 − 10 = ______
66 + 20 = ______
89 − 10 = ______
14 + 20 = ______
19 + 20 = ______
73 − 10 = ______
30 − 10 = ______
59 − 10 = ______
