Question

Calculați: (7/8+9/8)×5-2^2.
3×(1/3+1/4+1/12)-1
5-(1/2+1/15+1/30)×5 ​

Answer 1

Răspuns:

(7/8+9/8)×5-2^2=

(7/8+9/8)×5-2^2= 16/8 ×5-2^2=

(7/8+9/8)×5-2^2= 16/8 ×5-2^2=2 ×5-4=6

.

3×(1/3+1/4+1/12)-1=

3×(4/12+3/12+1/12)-1=

3×(16/12+1/12)-1=

3×17/12-1=

17/4-1=

16/4=4

.

5-(1/2+1/15+1/30)×5=

5-(15/30+2/30+1/30)×5=

5-(13/30+1/30)×5=

5-14/30×5=

5-14/6