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
28 + 20 = ______
31 − 10 = ______
9 × 10 = ______
8 × 10 = ______
43 + 10 = ______
71 + 10 = ______
99 − 10 = ______
31 + 20 = ______
17 + 10 = ______
60 − 10 = ______
38 + 10 = ______
12 + 10 = ______
47 − 10 = ______
36 + 20 = ______
91 − 10 = ______
24 + 20 = ______
72 − 10 = ______
2 × 10 = ______
62 + 10 = ______
77 − 10 = ______
