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
38 + 20 = ______
30 + 10 = ______
17 + 10 = ______
36 − 10 = ______
5 × 10 = ______
1 × 10 = ______
9 × 10 = ______
67 − 10 = ______
59 − 10 = ______
31 − 10 = ______
53 + 10 = ______
47 + 10 = ______
24 + 20 = ______
66 + 10 = ______
84 − 10 = ______
88 + 10 = ______
33 − 10 = ______
88 + 20 = ______
50 + 20 = ______
34 + 20 = ______
