Răspuns:
la 2: 12/6=10/5
la 1: (fara sa muti virgula): 5,4/x=4,5/2
x *4,5=5,4*2
4,5x=10,8
x=10,8/4,5=2,4
5: a) 25/100 *40= 100/10=10%
b)25/100*x=60 /*100 (inmultesti tot cu 100)
25x=6000
x=6000/25
x=240
la 3: 8,5 kg.......20,4lei
12kg.....xlei
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(12*20,4)/8,5=244,8/8,5=28,8lei
20,4 lei...........8,5kg
48lei.............xkg
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(48*8,5)/20,4=408/20,4=20kg
la 4 a) 4/5=80/100
Explicație pas cu pas:
