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
77 + 20 = ______
9 × 10 = ______
78 + 20 = ______
82 + 20 = ______
80 − 10 = ______
76 − 10 = ______
45 + 20 = ______
2 × 10 = ______
53 + 10 = ______
45 − 10 = ______
4 × 10 = ______
5 × 10 = ______
49 − 10 = ______
23 + 10 = ______
8 × 10 = ______
21 − 10 = ______
79 + 10 = ______
40 + 10 = ______
87 − 10 = ______
65 − 10 = ______
