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
38 + 20 = ______
13 + 20 = ______
4 × 10 = ______
5 × 10 = ______
86 + 20 = ______
86 + 10 = ______
9 × 10 = ______
37 + 10 = ______
67 + 20 = ______
33 − 10 = ______
87 − 10 = ______
78 + 20 = ______
17 + 20 = ______
52 − 10 = ______
1 × 10 = ______
26 − 10 = ______
61 + 20 = ______
77 + 20 = ______
11 + 20 = ______
55 − 10 = ______
