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
71 + 20 = ______
18 + 10 = ______
50 + 10 = ______
46 + 10 = ______
77 + 10 = ______
75 + 10 = ______
44 + 10 = ______
24 − 10 = ______
31 − 10 = ______
5 × 10 = ______
13 + 10 = ______
29 − 10 = ______
55 + 20 = ______
81 + 20 = ______
30 + 10 = ______
65 + 20 = ______
4 × 10 = ______
36 − 10 = ______
92 − 10 = ______
32 − 10 = ______
