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
81 + 10 = ______
1 × 10 = ______
54 − 10 = ______
21 − 10 = ______
75 + 20 = ______
84 + 10 = ______
85 + 10 = ______
86 − 10 = ______
44 + 10 = ______
2 × 10 = ______
17 + 20 = ______
49 − 10 = ______
5 × 10 = ______
69 − 10 = ______
7 × 10 = ______
66 + 20 = ______
28 + 10 = ______
77 + 10 = ______
35 + 20 = ______
19 + 20 = ______
