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
61 + 10 = ______
19 + 20 = ______
31 − 10 = ______
5 × 10 = ______
3 × 10 = ______
91 − 10 = ______
4 × 10 = ______
40 + 20 = ______
37 + 20 = ______
21 − 10 = ______
67 + 20 = ______
47 + 20 = ______
32 + 20 = ______
9 × 10 = ______
89 − 10 = ______
59 + 20 = ______
70 + 20 = ______
73 − 10 = ______
1 × 10 = ______
56 + 20 = ______
