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
5 × 10 = ______
83 − 10 = ______
80 − 10 = ______
78 + 10 = ______
79 − 10 = ______
67 − 10 = ______
68 + 20 = ______
50 + 20 = ______
27 + 10 = ______
35 − 10 = ______
29 + 20 = ______
77 + 10 = ______
21 + 20 = ______
49 + 20 = ______
4 × 10 = ______
38 − 10 = ______
40 − 10 = ______
8 × 10 = ______
74 + 20 = ______
25 + 10 = ______
