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
13 + 20 = ______
24 + 20 = ______
17 + 20 = ______
45 − 10 = ______
79 − 10 = ______
4 × 10 = ______
6 × 10 = ______
9 × 10 = ______
21 + 20 = ______
51 − 10 = ______
44 − 10 = ______
58 + 20 = ______
34 + 10 = ______
7 × 10 = ______
22 − 10 = ______
45 + 10 = ______
28 + 10 = ______
37 − 10 = ______
71 + 10 = ______
55 + 20 = ______
