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
39 − 10 = ______
48 + 20 = ______
21 − 10 = ______
44 + 20 = ______
77 + 20 = ______
17 + 10 = ______
4 × 10 = ______
62 − 10 = ______
38 + 20 = ______
5 × 10 = ______
18 + 20 = ______
45 − 10 = ______
6 × 10 = ______
8 × 10 = ______
74 + 10 = ______
63 + 10 = ______
64 + 20 = ______
2 × 10 = ______
66 − 10 = ______
40 + 10 = ______
