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
81 + 20 = ______
70 − 10 = ______
56 + 10 = ______
15 + 20 = ______
3 × 10 = ______
86 + 10 = ______
50 − 10 = ______
4 × 10 = ______
31 + 20 = ______
58 − 10 = ______
6 × 10 = ______
7 × 10 = ______
56 + 20 = ______
8 × 10 = ______
18 + 10 = ______
87 − 10 = ______
80 + 20 = ______
9 × 10 = ______
24 − 10 = ______
31 − 10 = ______
