Question

Aqui como fazer isso

Answer 1

Resposta:

Explicação passo a passo:

1.

2 4/5 x 39/10=

(10+4)/5 x (30+9)/10=

14/5x39/10=

546/50

2.

3 2/3 x 4 2/5=

(9+2)/3 x (20+2)/5=

11/3 x 22/5=

242/15

3.

3 2/3 x 4 3/10=

(9+2)/3 x (40+3)/10=

11/3 x43/10=

473/30

4.

2 1/5 x 3 2/3=

(10+1)/5 x 11/3=

11/5x11/3=

121/15

5.

3 1/2 x 4 3/5=

(6+11)/2 x(20+3)/5=

7/2 x23/5=

161/10

6.

2 3/5 x 3 4/5 =

(10+3)/5 x(15+4)/5=

13/5 x 19/5=

247/25

7.

4 2/5 x 3 2/5=

(20+2)/5 x(17/5)=

374/25

8.

2 3/4 x 2 3/5=

(8+3)/4 x(10+3)/5=

11/4 x 13/5=

143/20

9.

2 1/2 x 2 3/4=

(4+1)/2 x (8+3)/4=

5/2x11/4=

55/8

10.

2 1/58  x 3 3/4 =

(10+1)/5 + (12+3)/4=

11/5 x 15/4=

165/20