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
79 + 20 = ______
70 + 10 = ______
30 + 10 = ______
55 + 10 = ______
3 × 10 = ______
29 + 20 = ______
69 − 10 = ______
52 + 10 = ______
43 − 10 = ______
58 + 10 = ______
56 − 10 = ______
21 + 20 = ______
59 − 10 = ______
37 + 20 = ______
91 − 10 = ______
1 × 10 = ______
57 + 10 = ______
60 − 10 = ______
49 + 10 = ______
70 − 10 = ______
