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 = ______
43 − 10 = ______
21 − 10 = ______
63 + 20 = ______
23 + 10 = ______
2 × 10 = ______
5 × 10 = ______
51 + 10 = ______
32 − 10 = ______
49 − 10 = ______
78 + 20 = ______
85 − 10 = ______
9 × 10 = ______
16 + 20 = ______
45 − 10 = ______
79 + 10 = ______
21 + 10 = ______
35 + 20 = ______
3 × 10 = ______
39 − 10 = ______
