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
26 + 20 = ______
99 − 10 = ______
74 + 20 = ______
53 − 10 = ______
27 + 10 = ______
71 + 20 = ______
82 − 10 = ______
61 − 10 = ______
35 + 10 = ______
60 + 20 = ______
63 + 20 = ______
54 − 10 = ______
21 − 10 = ______
45 + 20 = ______
5 × 10 = ______
7 × 10 = ______
59 + 20 = ______
72 + 20 = ______
65 − 10 = ______
61 + 20 = ______
