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
34 + 20 = ______
61 + 10 = ______
12 + 20 = ______
5 × 10 = ______
85 + 10 = ______
50 + 10 = ______
78 − 10 = ______
2 × 10 = ______
15 + 20 = ______
3 × 10 = ______
67 − 10 = ______
26 − 10 = ______
86 + 10 = ______
19 + 10 = ______
57 + 10 = ______
69 − 10 = ______
80 + 10 = ______
87 + 20 = ______
1 × 10 = ______
99 − 10 = ______
