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
81 + 20 = ______
1 × 10 = ______
71 + 10 = ______
7 × 10 = ______
40 + 10 = ______
49 + 20 = ______
90 − 10 = ______
81 + 10 = ______
12 + 10 = ______
11 + 10 = ______
29 − 10 = ______
91 − 10 = ______
30 + 10 = ______
25 − 10 = ______
62 + 10 = ______
4 × 10 = ______
70 + 10 = ______
8 × 10 = ______
58 − 10 = ______
2 × 10 = ______
