va rog frumos toate!!
Răspunsuri la întrebare
Explicație pas cu pas:
1.) c. 2/3 =6/9
2•9=18 6•3=18
d.2/7=10/35
2•35=70 10•7=70
e. 2/10=1/5
2•5=10 1•10=10
f.6/5≠6/10
6•10=60 5•6=30
g.8/24=1/3
8•3=24 24•1=24
h.15/25≠3/4
15•4=60 25•3=75
i.15/25=3/5
15•5=75 25•3=75
j.60/80≠2/3
60•3=180 80•2=160
k.70/50≠5/7
70•7=490 5•50=250
l.102/24=17/4
102•4=408 17•24=408
2.
a.1/7=2/24
1•14=14 2•7=14
b.3/5≠3/4
3•4=12 3•5=15
c.21/49=3/7
21•7=147 49•3=147
d. 12/30≠5/6
12•6=72 30•5=150
e.2/11=18/99
2•99=198 11•18=198
f.5/13≠20/39
5•39=195 13•20=260
g.6/7≠54/6
6•6=36 54•7=378
h.9/5=36/20
9•20=180 36•5=180
i.6/11≠12/33
6•33=198 11•12=132
j.8/12≠20/15
8•15=120 12•20=240
k.100/53≠2/1
100•1=100 53•2=106
l.42/5=84/10
42•10=420 84•5=420
3. notăm numărul necunoscut cu x
a. 3/5=x/10
3•10=x•5
30=x•5
x=30:5
x=6
3/5=6/10
b. 7/9=21/x
7•x=21•9
7•x=189
x=189:7
x=27
7/9=21/27
c. x/4=12/16
x•16=12•4
x•16=48
x=48:16
x=3
3/4=12/16
d. 11/x=1/7
11•7=1•x
77=1•x
x=77:1
x=77
11/77=1/7
e. nu înțeleg ce e la punctul acesta