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
89 + 20 = ______
6 × 10 = ______
79 − 10 = ______
67 − 10 = ______
69 + 10 = ______
99 − 10 = ______
97 − 10 = ______
57 − 10 = ______
50 + 20 = ______
68 + 20 = ______
80 + 10 = ______
81 − 10 = ______
55 − 10 = ______
57 + 20 = ______
1 × 10 = ______
5 × 10 = ______
3 × 10 = ______
88 + 20 = ______
28 − 10 = ______
21 + 20 = ______
