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
57 + 20 = ______
55 − 10 = ______
67 + 20 = ______
27 + 10 = ______
75 + 10 = ______
38 − 10 = ______
79 − 10 = ______
30 + 10 = ______
45 + 20 = ______
61 + 10 = ______
47 − 10 = ______
25 + 20 = ______
46 − 10 = ______
1 × 10 = ______
3 × 10 = ______
87 − 10 = ______
71 − 10 = ______
70 + 20 = ______
39 + 20 = ______
37 − 10 = ______
