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
56 − 10 = ______
42 + 20 = ______
29 + 20 = ______
12 + 10 = ______
27 + 10 = ______
83 − 10 = ______
29 − 10 = ______
50 − 10 = ______
2 × 10 = ______
58 + 10 = ______
4 × 10 = ______
80 − 10 = ______
39 − 10 = ______
79 + 10 = ______
7 × 10 = ______
67 + 20 = ______
60 − 10 = ______
6 × 10 = ______
57 + 10 = ______
77 + 20 = ______
