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
70 − 10 = ______
83 − 10 = ______
88 + 20 = ______
7 × 10 = ______
21 + 20 = ______
30 + 20 = ______
55 − 10 = ______
67 + 10 = ______
62 − 10 = ______
3 × 10 = ______
42 − 10 = ______
72 + 10 = ______
23 + 20 = ______
30 − 10 = ______
85 − 10 = ______
86 + 10 = ______
20 + 20 = ______
63 − 10 = ______
73 + 10 = ______
70 + 10 = ______
