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
70 + 20 = ______
12 + 20 = ______
4 × 10 = ______
39 + 20 = ______
14 + 20 = ______
2 × 10 = ______
56 + 10 = ______
40 − 10 = ______
31 − 10 = ______
1 × 10 = ______
23 − 10 = ______
7 × 10 = ______
82 − 10 = ______
26 − 10 = ______
37 + 20 = ______
6 × 10 = ______
53 − 10 = ______
36 − 10 = ______
61 − 10 = ______
25 − 10 = ______
