Question

Calculeaza: ajutati-ma va rog mult ​

Answer 1

Răspuns:

a.195-6×(30-3×9+27)

195-6×(30-27+27)

195-6×30

195-180=

15

b.5×(4+3×7)-2×{5+2×[10-3×(14-3×4)]}

5×25-2×[5+2×(10-3×2)]

125-2×(5+2×4)

125-2×13

125-26=

99

c.{30+10×[207-6×(28+28÷7)]}÷10-1

[30+10×(207-6×32)]÷10-1

[30+10×(207-192)]÷10-1

(30+10×15)÷10-1

(30+150)÷10-1

180÷10-1

18-1

17