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
61 + 20 = ______
29 + 10 = ______
79 − 10 = ______
5 × 10 = ______
81 − 10 = ______
38 + 10 = ______
2 × 10 = ______
99 − 10 = ______
48 + 20 = ______
87 + 20 = ______
60 + 10 = ______
60 − 10 = ______
15 + 10 = ______
62 − 10 = ______
78 + 10 = ______
30 + 10 = ______
90 − 10 = ______
77 + 10 = ______
82 + 20 = ______
3 × 10 = ______
