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 = ______
8 × 10 = ______
81 − 10 = ______
93 − 10 = ______
39 + 20 = ______
69 + 20 = ______
1 × 10 = ______
5 × 10 = ______
2 × 10 = ______
21 + 10 = ______
84 + 10 = ______
83 − 10 = ______
64 − 10 = ______
51 + 10 = ______
82 + 20 = ______
47 − 10 = ______
53 − 10 = ______
12 + 20 = ______
22 − 10 = ______
3 × 10 = ______
