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
90 − 10 = ______
3 × 10 = ______
45 − 10 = ______
39 + 10 = ______
71 + 20 = ______
37 − 10 = ______
54 + 20 = ______
56 + 20 = ______
9 × 10 = ______
73 + 10 = ______
7 × 10 = ______
13 + 10 = ______
74 − 10 = ______
61 + 20 = ______
21 + 20 = ______
52 + 20 = ______
83 − 10 = ______
4 × 10 = ______
5 × 10 = ______
15 + 10 = ______
