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
87 + 10 = ______
87 + 20 = ______
4 × 10 = ______
39 − 10 = ______
9 × 10 = ______
86 − 10 = ______
28 + 20 = ______
20 + 10 = ______
33 + 20 = ______
88 − 10 = ______
45 + 10 = ______
64 + 10 = ______
84 + 10 = ______
50 + 20 = ______
2 × 10 = ______
77 − 10 = ______
33 − 10 = ______
57 + 20 = ______
98 − 10 = ______
27 + 10 = ______
