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
1 × 10 = ______
21 − 10 = ______
45 + 20 = ______
48 − 10 = ______
6 × 10 = ______
5 × 10 = ______
85 + 10 = ______
39 − 10 = ______
20 + 20 = ______
71 − 10 = ______
54 + 10 = ______
81 − 10 = ______
44 − 10 = ______
82 + 20 = ______
2 × 10 = ______
63 + 20 = ______
9 × 10 = ______
47 + 10 = ______
42 − 10 = ______
79 + 20 = ______
