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
81 + 10 = ______
91 − 10 = ______
30 + 10 = ______
27 − 10 = ______
2 × 10 = ______
88 + 20 = ______
45 − 10 = ______
51 + 10 = ______
69 + 10 = ______
5 × 10 = ______
30 + 20 = ______
72 − 10 = ______
13 + 10 = ______
35 − 10 = ______
26 + 20 = ______
21 − 10 = ______
35 + 20 = ______
31 − 10 = ______
89 + 20 = ______
92 − 10 = ______
