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
26 + 10 = ______
51 − 10 = ______
27 + 10 = ______
6 × 10 = ______
89 + 10 = ______
85 − 10 = ______
35 + 10 = ______
4 × 10 = ______
72 + 20 = ______
1 × 10 = ______
83 − 10 = ______
5 × 10 = ______
39 − 10 = ______
30 + 10 = ______
50 − 10 = ______
51 + 20 = ______
38 + 20 = ______
54 + 20 = ______
21 + 20 = ______
79 + 20 = ______
