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
27 + 20 = ______
5 × 10 = ______
81 − 10 = ______
83 + 20 = ______
2 × 10 = ______
25 − 10 = ______
21 − 10 = ______
1 × 10 = ______
61 + 20 = ______
4 × 10 = ______
59 + 20 = ______
91 − 10 = ______
92 − 10 = ______
64 + 20 = ______
32 + 10 = ______
43 + 10 = ______
81 + 20 = ______
8 × 10 = ______
6 × 10 = ______
27 − 10 = ______
