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
20 + 20 = ______
2 × 10 = ______
84 − 10 = ______
4 × 10 = ______
79 + 20 = ______
39 + 20 = ______
12 + 20 = ______
1 × 10 = ______
67 + 10 = ______
47 − 10 = ______
33 − 10 = ______
6 × 10 = ______
43 − 10 = ______
7 × 10 = ______
70 + 10 = ______
61 + 10 = ______
3 × 10 = ______
51 − 10 = ______
50 + 20 = ______
80 + 20 = ______
