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
57 + 20 = ______
37 + 20 = ______
84 + 20 = ______
31 + 20 = ______
61 + 20 = ______
3 × 10 = ______
57 − 10 = ______
71 − 10 = ______
33 − 10 = ______
20 + 10 = ______
60 + 20 = ______
78 − 10 = ______
73 − 10 = ______
21 + 10 = ______
38 + 20 = ______
87 + 20 = ______
5 × 10 = ______
98 − 10 = ______
54 + 20 = ______
31 − 10 = ______
