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
71 + 20 = ______
5 × 10 = ______
8 × 10 = ______
6 × 10 = ______
80 − 10 = ______
49 − 10 = ______
13 + 10 = ______
47 − 10 = ______
72 − 10 = ______
3 × 10 = ______
76 + 10 = ______
55 − 10 = ______
54 − 10 = ______
1 × 10 = ______
30 − 10 = ______
2 × 10 = ______
48 + 10 = ______
9 × 10 = ______
82 − 10 = ______
81 + 20 = ______
