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
17 + 20 = ______
71 + 20 = ______
13 + 10 = ______
29 + 20 = ______
84 + 20 = ______
42 + 20 = ______
83 + 20 = ______
97 − 10 = ______
52 + 10 = ______
5 × 10 = ______
24 − 10 = ______
87 − 10 = ______
6 × 10 = ______
33 − 10 = ______
28 − 10 = ______
29 + 10 = ______
41 − 10 = ______
9 × 10 = ______
59 + 10 = ______
27 − 10 = ______
