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
46 + 20 = ______
15 + 10 = ______
46 − 10 = ______
5 × 10 = ______
8 × 10 = ______
92 − 10 = ______
1 × 10 = ______
88 + 10 = ______
36 + 10 = ______
21 − 10 = ______
69 + 20 = ______
13 + 20 = ______
68 + 10 = ______
87 − 10 = ______
50 + 20 = ______
57 − 10 = ______
2 × 10 = ______
4 × 10 = ______
9 × 10 = ______
15 + 20 = ______
