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
17 + 10 = ______
57 + 20 = ______
40 − 10 = ______
78 + 20 = ______
85 − 10 = ______
47 + 20 = ______
93 − 10 = ______
6 × 10 = ______
49 − 10 = ______
89 + 10 = ______
26 + 10 = ______
72 − 10 = ______
5 × 10 = ______
68 − 10 = ______
70 − 10 = ______
75 + 20 = ______
86 + 10 = ______
2 × 10 = ______
22 + 10 = ______
3 × 10 = ______
