Question

va rog urgent!!!!! dau coroana

Answer 1

a) (4/5+0,2×0,4) :11/100= (4/5+2/10×4/10) :11/100=(4/5+1/5×2/5) :11/100=
=(4/5+2/25) ×100/11=(20+2)/1 ×4/11=22 ×4/11=8


b) [9,7+(18,03-11/2)×10] :5= [97/10+(1803/100-550/100)×10] :5=
=[97/10+1253/100×10] :5=(97/10+1253/10) :5=1350/10 ×1/5=135×1/5=27

c) [3/4+(0,5)²³:(0,5)²¹-0,2(3)]:23/5=[3/4+(0,5)²-2/9] ×5/23=
0,2(3)=(23-2) /90=21/90=7/30
=(3/4+0,25-7/30) ×5/23=(3/4+1/4-7/30) ×5/23=(1-7/30) ×5/23=
=(30-7)/30 ×5/23=23/6×1/23=1/6