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
59 + 20 = ______
55 + 20 = ______
9 × 10 = ______
64 + 20 = ______
63 + 10 = ______
91 − 10 = ______
7 × 10 = ______
99 − 10 = ______
86 + 20 = ______
6 × 10 = ______
71 − 10 = ______
67 − 10 = ______
79 + 20 = ______
3 × 10 = ______
98 − 10 = ______
66 + 20 = ______
50 − 10 = ______
2 × 10 = ______
39 + 20 = ______
11 + 20 = ______
