Question

resolva as expressões:a) 3\8(1\2×4\3)+4\5

Answer 1

3/8 . ( 1/2 *  4/3) + 4/5 =
1/2 * 4/3 = 4/6 = 2/3 ***
reescrevendo
3/8 *  2/3 + 4/5=
3/8 * 2/3 = 6/24 = 1/4 ****
reescrevendo
1/4 + 4/5 = 
mmc = 20
( 5 + 16)/20 = 21/20 ou  1 int  1/20  *** ****
Para extrair os inteiros  1   1/20  basta dividir 21 por 20