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
79 + 20 = ______
81 + 20 = ______
84 + 10 = ______
15 + 10 = ______
64 + 10 = ______
32 + 10 = ______
61 − 10 = ______
67 − 10 = ______
34 + 20 = ______
28 + 10 = ______
64 + 20 = ______
51 − 10 = ______
6 × 10 = ______
25 − 10 = ______
55 − 10 = ______
1 × 10 = ______
49 − 10 = ______
19 + 20 = ______
81 − 10 = ______
3 × 10 = ______
