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
51 + 20 = ______
4 × 10 = ______
7 × 10 = ______
42 + 20 = ______
35 − 10 = ______
47 + 20 = ______
20 + 10 = ______
84 + 10 = ______
66 + 20 = ______
78 − 10 = ______
68 − 10 = ______
2 × 10 = ______
8 × 10 = ______
87 + 10 = ______
55 + 10 = ______
57 + 10 = ______
40 − 10 = ______
12 + 20 = ______
19 + 10 = ______
23 − 10 = ______
