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 = ______
54 + 10 = ______
51 − 10 = ______
42 − 10 = ______
75 + 20 = ______
53 + 20 = ______
71 + 10 = ______
20 + 20 = ______
63 + 20 = ______
53 − 10 = ______
80 − 10 = ______
78 + 10 = ______
7 × 10 = ______
82 − 10 = ______
27 − 10 = ______
18 + 10 = ______
6 × 10 = ______
42 + 20 = ______
26 + 10 = ______
9 × 10 = ______
