Question

façam a 43,44e a 45 ppfpfpfpffpfpfpfpfpfppfppfppfpfpfpfpfpf

Answer 1

43)      4.2/5+3.3/4=22/5+18/4= 88+90/20=178/20=89/10 ou 8,9
44)      7/3.22/5=101/15
45)      13/4:19/7=13/4.7/19=91/76

Answer 2

43. 22/5+15/4=(88+75)/20=163/20
44. (7/3)*(22/5)=154/15
45. (13/4)/(19/7)=(13/4)*(7/19)=91/76