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
14 + 20 = ______
16 + 10 = ______
28 + 20 = ______
31 − 10 = ______
67 − 10 = ______
58 − 10 = ______
9 × 10 = ______
18 + 10 = ______
81 − 10 = ______
8 × 10 = ______
76 + 20 = ______
84 + 20 = ______
20 + 20 = ______
83 + 10 = ______
2 × 10 = ______
63 − 10 = ______
1 × 10 = ______
72 + 20 = ______
34 + 20 = ______
80 + 20 = ______
