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
39 + 20 = ______
35 + 20 = ______
38 − 10 = ______
71 + 10 = ______
61 − 10 = ______
9 × 10 = ______
6 × 10 = ______
22 + 20 = ______
29 − 10 = ______
50 + 20 = ______
72 + 10 = ______
89 − 10 = ______
42 + 10 = ______
82 − 10 = ______
49 + 10 = ______
72 + 20 = ______
52 − 10 = ______
27 + 20 = ______
3 × 10 = ______
78 + 10 = ______
