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
38 + 20 = ______
31 + 10 = ______
8 × 10 = ______
3 × 10 = ______
27 − 10 = ______
66 − 10 = ______
4 × 10 = ______
12 + 20 = ______
47 − 10 = ______
51 − 10 = ______
84 − 10 = ______
32 + 20 = ______
37 − 10 = ______
20 + 20 = ______
32 + 10 = ______
2 × 10 = ______
49 + 10 = ______
30 + 20 = ______
55 + 10 = ______
72 + 20 = ______
