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
20 + 20 = ______
82 − 10 = ______
86 − 10 = ______
34 + 20 = ______
79 + 10 = ______
74 + 20 = ______
54 + 10 = ______
7 × 10 = ______
9 × 10 = ______
50 + 10 = ______
57 + 10 = ______
61 − 10 = ______
74 − 10 = ______
72 − 10 = ______
82 + 10 = ______
12 + 10 = ______
18 + 20 = ______
2 × 10 = ______
43 + 20 = ______
58 + 10 = ______
