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
2 × 10 = ______
45 + 10 = ______
72 − 10 = ______
21 − 10 = ______
56 + 20 = ______
43 + 20 = ______
20 + 10 = ______
76 + 20 = ______
55 + 10 = ______
5 × 10 = ______
27 + 20 = ______
22 + 10 = ______
67 + 10 = ______
56 − 10 = ______
89 − 10 = ______
3 × 10 = ______
85 − 10 = ______
7 × 10 = ______
65 + 20 = ______
11 + 20 = ______
