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
65 + 20 = ______
80 + 20 = ______
26 + 20 = ______
39 + 20 = ______
56 + 20 = ______
48 − 10 = ______
8 × 10 = ______
77 + 10 = ______
39 − 10 = ______
38 + 20 = ______
55 + 10 = ______
55 + 20 = ______
9 × 10 = ______
5 × 10 = ______
36 − 10 = ______
69 − 10 = ______
68 + 10 = ______
62 − 10 = ______
27 − 10 = ______
3 × 10 = ______
