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
21 + 10 = ______
45 + 10 = ______
69 + 10 = ______
35 − 10 = ______
86 + 10 = ______
32 + 20 = ______
83 − 10 = ______
39 + 10 = ______
39 − 10 = ______
17 + 20 = ______
65 − 10 = ______
48 − 10 = ______
3 × 10 = ______
92 − 10 = ______
4 × 10 = ______
62 + 20 = ______
25 + 10 = ______
11 + 20 = ______
19 + 20 = ______
7 × 10 = ______
