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
57 + 20 = ______
54 − 10 = ______
66 + 20 = ______
68 − 10 = ______
9 × 10 = ______
13 + 10 = ______
7 × 10 = ______
34 − 10 = ______
56 + 10 = ______
63 − 10 = ______
38 + 20 = ______
35 − 10 = ______
4 × 10 = ______
98 − 10 = ______
57 + 10 = ______
8 × 10 = ______
21 + 10 = ______
83 + 10 = ______
60 + 20 = ______
65 + 10 = ______
