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 = ______
24 − 10 = ______
22 + 10 = ______
25 + 20 = ______
7 × 10 = ______
73 + 20 = ______
39 − 10 = ______
52 + 10 = ______
6 × 10 = ______
77 + 10 = ______
1 × 10 = ______
47 + 20 = ______
83 − 10 = ______
75 − 10 = ______
2 × 10 = ______
74 − 10 = ______
28 + 20 = ______
57 + 10 = ______
81 − 10 = ______
44 + 20 = ______
