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 + 20 = ______
1 × 10 = ______
89 + 10 = ______
2 × 10 = ______
55 + 10 = ______
63 + 20 = ______
79 + 20 = ______
67 − 10 = ______
4 × 10 = ______
34 − 10 = ______
73 + 20 = ______
61 + 20 = ______
69 + 20 = ______
34 + 10 = ______
68 − 10 = ______
47 − 10 = ______
88 + 10 = ______
19 + 10 = ______
21 − 10 = ______
17 + 20 = ______
