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 = ______
37 + 10 = ______
54 − 10 = ______
32 − 10 = ______
32 + 20 = ______
29 + 20 = ______
77 − 10 = ______
60 − 10 = ______
29 − 10 = ______
88 + 20 = ______
84 + 10 = ______
1 × 10 = ______
31 + 20 = ______
9 × 10 = ______
73 + 10 = ______
8 × 10 = ______
21 − 10 = ______
62 − 10 = ______
79 − 10 = ______
12 + 20 = ______
