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
15 + 20 = ______
63 + 20 = ______
34 + 10 = ______
74 − 10 = ______
80 − 10 = ______
8 × 10 = ______
46 + 10 = ______
46 − 10 = ______
24 + 10 = ______
93 − 10 = ______
85 + 10 = ______
36 − 10 = ______
5 × 10 = ______
78 − 10 = ______
64 + 10 = ______
9 × 10 = ______
7 × 10 = ______
50 + 20 = ______
25 + 10 = ______
57 + 20 = ______
