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
21 + 20 = ______
1 × 10 = ______
8 × 10 = ______
73 − 10 = ______
72 − 10 = ______
53 + 10 = ______
66 + 20 = ______
4 × 10 = ______
49 + 10 = ______
55 − 10 = ______
68 + 10 = ______
23 + 20 = ______
65 − 10 = ______
5 × 10 = ______
60 − 10 = ______
45 + 10 = ______
29 + 20 = ______
63 + 20 = ______
7 × 10 = ______
25 − 10 = ______
