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
21 + 20 = ______
85 + 20 = ______
57 + 20 = ______
9 × 10 = ______
43 + 20 = ______
45 + 10 = ______
27 + 20 = ______
76 + 20 = ______
79 + 20 = ______
8 × 10 = ______
69 + 20 = ______
22 − 10 = ______
85 − 10 = ______
51 − 10 = ______
81 + 10 = ______
28 − 10 = ______
6 × 10 = ______
76 + 10 = ______
34 + 10 = ______
63 − 10 = ______
