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
28 + 20 = ______
2 × 10 = ______
71 + 20 = ______
8 × 10 = ______
56 + 20 = ______
42 + 10 = ______
26 + 10 = ______
77 + 20 = ______
4 × 10 = ______
13 + 10 = ______
21 − 10 = ______
76 − 10 = ______
21 + 10 = ______
90 − 10 = ______
9 × 10 = ______
57 + 20 = ______
5 × 10 = ______
76 + 20 = ______
49 + 10 = ______
55 − 10 = ______
