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
23 + 10 = ______
68 + 20 = ______
78 + 20 = ______
18 + 20 = ______
43 − 10 = ______
21 − 10 = ______
89 + 20 = ______
83 + 20 = ______
30 + 20 = ______
28 − 10 = ______
34 − 10 = ______
72 − 10 = ______
50 + 10 = ______
2 × 10 = ______
45 + 10 = ______
58 + 20 = ______
8 × 10 = ______
82 + 20 = ______
61 + 20 = ______
5 × 10 = ______
