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
19 + 10 = ______
31 + 20 = ______
79 + 20 = ______
46 − 10 = ______
30 + 20 = ______
84 − 10 = ______
2 × 10 = ______
12 + 20 = ______
8 × 10 = ______
9 × 10 = ______
64 − 10 = ______
67 + 10 = ______
83 − 10 = ______
4 × 10 = ______
7 × 10 = ______
3 × 10 = ______
46 + 10 = ______
40 + 10 = ______
28 + 20 = ______
33 + 20 = ______
