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
9 × 10 = ______
3 × 10 = ______
7 × 10 = ______
94 − 10 = ______
24 + 10 = ______
99 − 10 = ______
79 + 10 = ______
70 + 10 = ______
2 × 10 = ______
8 × 10 = ______
77 + 20 = ______
21 + 20 = ______
33 + 10 = ______
26 + 20 = ______
88 + 10 = ______
5 × 10 = ______
18 + 10 = ______
53 − 10 = ______
89 + 20 = ______
68 + 20 = ______
