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
19 + 20 = ______
67 + 10 = ______
3 × 10 = ______
36 + 20 = ______
16 + 10 = ______
66 + 10 = ______
75 + 10 = ______
90 − 10 = ______
2 × 10 = ______
14 + 20 = ______
16 + 20 = ______
77 − 10 = ______
89 − 10 = ______
34 − 10 = ______
86 + 10 = ______
71 + 10 = ______
46 − 10 = ______
1 × 10 = ______
17 + 10 = ______
11 + 10 = ______
