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
7 × 10 = ______
15 + 20 = ______
9 × 10 = ______
6 × 10 = ______
86 + 20 = ______
21 + 20 = ______
3 × 10 = ______
2 × 10 = ______
43 + 20 = ______
89 + 20 = ______
11 + 10 = ______
50 − 10 = ______
81 + 10 = ______
79 + 10 = ______
42 − 10 = ______
5 × 10 = ______
17 + 20 = ______
58 + 20 = ______
8 × 10 = ______
90 − 10 = ______
