Question

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Answer 1

40:

a: =2,5*4*20,21

=20,21*10

=202,1

b: =0,25*0,4*1,25*8

=10*0,1

=1

9:

a: =>0,4y=6

=>y=6:0,4=15

b: 105:y=7,46-3,26

=>105:y=4,2

=>y=105/4,2=25

c: y+1,59=12*2,5

=>y+1,59=30

=>y=28,41

d: 3,75:y=3:4

=>3,75:y=0,75

=>y=3,75:0,75=5