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 = ______
28 + 20 = ______
55 − 10 = ______
17 + 10 = ______
54 − 10 = ______
60 − 10 = ______
57 + 10 = ______
2 × 10 = ______
52 − 10 = ______
1 × 10 = ______
66 + 10 = ______
25 − 10 = ______
74 + 20 = ______
59 + 10 = ______
43 + 20 = ______
81 + 20 = ______
8 × 10 = ______
61 − 10 = ______
62 + 20 = ______
99 − 10 = ______
