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
70 + 20 = ______
39 + 20 = ______
80 − 10 = ______
14 + 20 = ______
89 + 20 = ______
47 − 10 = ______
27 + 20 = ______
7 × 10 = ______
36 − 10 = ______
3 × 10 = ______
83 + 20 = ______
4 × 10 = ______
77 + 20 = ______
43 + 20 = ______
76 − 10 = ______
25 + 10 = ______
1 × 10 = ______
5 × 10 = ______
75 − 10 = ______
34 + 20 = ______
