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
64 + 20 = ______
2 × 10 = ______
89 + 10 = ______
88 + 10 = ______
9 × 10 = ______
7 × 10 = ______
3 × 10 = ______
26 − 10 = ______
41 + 20 = ______
82 − 10 = ______
5 × 10 = ______
47 − 10 = ______
6 × 10 = ______
81 − 10 = ______
43 + 20 = ______
32 − 10 = ______
34 + 10 = ______
85 − 10 = ______
48 + 20 = ______
66 + 20 = ______
