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
43 + 20 = ______
8 × 10 = ______
21 + 20 = ______
26 + 20 = ______
71 − 10 = ______
61 + 20 = ______
25 + 10 = ______
56 + 20 = ______
77 + 20 = ______
70 + 20 = ______
78 − 10 = ______
3 × 10 = ______
65 − 10 = ______
86 + 10 = ______
86 + 20 = ______
6 × 10 = ______
12 + 20 = ______
12 + 10 = ______
66 − 10 = ______
67 − 10 = ______
