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
80 + 20 = ______
81 + 20 = ______
35 + 10 = ______
47 − 10 = ______
89 + 20 = ______
31 − 10 = ______
2 × 10 = ______
61 + 10 = ______
5 × 10 = ______
68 + 10 = ______
56 + 10 = ______
70 + 20 = ______
51 + 20 = ______
41 − 10 = ______
7 × 10 = ______
61 − 10 = ______
84 + 20 = ______
4 × 10 = ______
90 − 10 = ______
78 − 10 = ______
