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
55 + 20 = ______
97 − 10 = ______
99 − 10 = ______
9 × 10 = ______
8 × 10 = ______
39 + 20 = ______
88 + 20 = ______
79 − 10 = ______
70 + 10 = ______
7 × 10 = ______
80 + 20 = ______
6 × 10 = ______
5 × 10 = ______
24 − 10 = ______
85 + 20 = ______
45 + 20 = ______
23 + 20 = ______
84 + 20 = ______
72 + 20 = ______
87 − 10 = ______
