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
64 + 20 = ______
20 + 20 = ______
2 × 10 = ______
61 + 10 = ______
85 + 10 = ______
47 + 10 = ______
85 + 20 = ______
55 − 10 = ______
33 − 10 = ______
57 + 20 = ______
97 − 10 = ______
80 + 20 = ______
31 − 10 = ______
64 − 10 = ______
35 + 20 = ______
7 × 10 = ______
62 + 10 = ______
20 + 10 = ______
40 − 10 = ______
3 × 10 = ______
