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
45 + 10 = ______
74 + 10 = ______
76 + 20 = ______
71 − 10 = ______
27 + 20 = ______
37 + 20 = ______
33 − 10 = ______
4 × 10 = ______
3 × 10 = ______
71 + 10 = ______
50 − 10 = ______
69 + 10 = ______
88 − 10 = ______
66 + 20 = ______
6 × 10 = ______
21 − 10 = ______
22 + 10 = ______
44 − 10 = ______
84 + 20 = ______
83 + 20 = ______
