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
1 × 10 = ______
9 × 10 = ______
74 + 20 = ______
12 + 20 = ______
3 × 10 = ______
39 + 20 = ______
74 − 10 = ______
34 + 10 = ______
32 + 20 = ______
87 + 20 = ______
54 + 10 = ______
40 − 10 = ______
21 − 10 = ______
56 + 10 = ______
6 × 10 = ______
12 + 10 = ______
39 − 10 = ______
73 − 10 = ______
28 − 10 = ______
83 − 10 = ______
