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
66 − 10 = ______
89 + 20 = ______
57 + 20 = ______
39 + 10 = ______
19 + 10 = ______
5 × 10 = ______
42 + 20 = ______
7 × 10 = ______
34 − 10 = ______
9 × 10 = ______
23 + 20 = ______
59 + 10 = ______
71 − 10 = ______
81 − 10 = ______
31 − 10 = ______
28 + 20 = ______
68 + 20 = ______
21 + 20 = ______
8 × 10 = ______
13 + 10 = ______
