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
41 − 10 = ______
57 − 10 = ______
21 + 20 = ______
61 − 10 = ______
26 + 10 = ______
94 − 10 = ______
87 − 10 = ______
36 − 10 = ______
53 − 10 = ______
71 + 20 = ______
67 + 20 = ______
26 + 20 = ______
2 × 10 = ______
34 + 20 = ______
51 + 10 = ______
4 × 10 = ______
9 × 10 = ______
7 × 10 = ______
73 + 20 = ______
6 × 10 = ______
