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
27 + 20 = ______
5 × 10 = ______
8 × 10 = ______
49 + 10 = ______
54 + 10 = ______
92 − 10 = ______
53 + 10 = ______
76 − 10 = ______
46 − 10 = ______
99 − 10 = ______
9 × 10 = ______
71 + 10 = ______
13 + 20 = ______
89 − 10 = ______
80 + 20 = ______
69 + 20 = ______
98 − 10 = ______
11 + 10 = ______
3 × 10 = ______
29 − 10 = ______
