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 = ______
8 × 10 = ______
77 + 10 = ______
51 − 10 = ______
67 + 10 = ______
55 − 10 = ______
4 × 10 = ______
99 − 10 = ______
14 + 20 = ______
2 × 10 = ______
6 × 10 = ______
82 − 10 = ______
20 + 10 = ______
59 + 20 = ______
82 + 20 = ______
67 + 20 = ______
3 × 10 = ______
79 − 10 = ______
13 + 10 = ______
36 − 10 = ______
