Question

|-0,4+0,1|x(-2/3)
2/5-(-3/2²):5/8
(-1/2²)x16/3-5/6:(-5/2)
-3,5:(-14)+0,25x3​
repede dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

|- 0,4| + |0,1| × (- 2/3)

= |- 4/10| + |1/10| × (- 2/3)

= |- 2/5| + 1/10 × (- 2/3)

= 2/5 - 2/30

= 2/5 - 1/15 = 6/15 - 1/15 = 5/15 = 1/3

______________

2/5 - (- 3/2)² : 5/8

= 2/5 - (3/2)² × 8/5

= 2/5 - 9/4 × 8/5

= 2/5 - 72/20 = 2/5 - 18/5 = - 16/5

______________

(- 1/2)² × 16/3 - 5/6 : (- 5/2)

= (1/2)² × 16/3 + 5/6 × 2/5

= 1/4 × 16/3 + 10/30

= 16/12 + 1/3 = 4/3 + 1/3 = 5/3

______________

- 3,5 : (- 14) + 0,25 × 3

= 3,5 : 14 + 0,75

= 0,25 + 0,75 = 1