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
39 + 20 = ______
81 + 10 = ______
13 + 20 = ______
15 + 20 = ______
26 − 10 = ______
32 − 10 = ______
83 − 10 = ______
29 + 20 = ______
7 × 10 = ______
6 × 10 = ______
4 × 10 = ______
74 − 10 = ______
67 − 10 = ______
2 × 10 = ______
37 + 20 = ______
63 + 10 = ______
91 − 10 = ______
25 + 20 = ______
27 − 10 = ______
87 + 20 = ______
