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
71 + 10 = ______
75 + 10 = ______
65 + 20 = ______
2 × 10 = ______
56 − 10 = ______
74 + 20 = ______
49 − 10 = ______
80 + 20 = ______
53 − 10 = ______
85 − 10 = ______
79 + 20 = ______
20 + 10 = ______
31 + 10 = ______
66 + 20 = ______
88 − 10 = ______
9 × 10 = ______
24 − 10 = ______
7 × 10 = ______
61 + 20 = ______
60 + 20 = ______
