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
9 × 10 = ______
81 + 10 = ______
4 × 10 = ______
1 × 10 = ______
82 − 10 = ______
65 + 10 = ______
6 × 10 = ______
98 − 10 = ______
57 + 20 = ______
27 + 10 = ______
80 + 20 = ______
66 + 10 = ______
20 + 10 = ______
84 + 10 = ______
17 + 10 = ______
74 + 20 = ______
63 − 10 = ______
31 − 10 = ______
42 − 10 = ______
22 + 20 = ______
