Răspuns :
5) 20/3-5/9-8/3=60-5-24/9=31/9=3,4 numitorul comun este 9
6) 20/2-9/3+11/6=60-18+11/6=53/6=8,83numitorul comun este 6
7) 53/10-20/100-7/50=530-20-14/100=496/100=4,96 numitorul comun este 100
1) 78/100x4800=374400:100=3744
22/100x350=7700:100=77
3744+77=3821
4) 5500x5/100=27500:100=275
5500+275=5775
nu stiu 2 si 3
6) 20/2-9/3+11/6=60-18+11/6=53/6=8,83numitorul comun este 6
7) 53/10-20/100-7/50=530-20-14/100=496/100=4,96 numitorul comun este 100
1) 78/100x4800=374400:100=3744
22/100x350=7700:100=77
3744+77=3821
4) 5500x5/100=27500:100=275
5500+275=5775
nu stiu 2 si 3
1) 78/100*4800 +22/100*350 =
78*4800/100 + 22*350 /100 =
374 400/100 + 7700/100 =
382 100/100 = 3821
2) x/7*1477 = 1055
x*1477/7 = 1055/1
x*1477 = 1055*7
x*1477 = 7385
x = 7385:1477
x = 5
3) 17/x*180 = 153
17*180/x = 153
3060/x = 153/1
153*x = 3060
x = 3060:153
x = 20
4) 5500 +5/100*5500 =
5500 + 5*5500/100 =
5500 + 27500/100 =
5500 + 275 = 5775 lei
5) 20/3-5/9-8/3 = 60/9-5/9-24/9 = 55/9-24/9 = 31/9
6) 20/2 - 9/3 + 11/6 = 60/6 - 18/6 + 11/6 = 42/6+11/6 = 53/6
7) 53/10 - 20/100 - 7/50 = 530/100 - 20/100 - 14/100=
510/100-14/100 = 496/100 = 248/50 = 124/25
78*4800/100 + 22*350 /100 =
374 400/100 + 7700/100 =
382 100/100 = 3821
2) x/7*1477 = 1055
x*1477/7 = 1055/1
x*1477 = 1055*7
x*1477 = 7385
x = 7385:1477
x = 5
3) 17/x*180 = 153
17*180/x = 153
3060/x = 153/1
153*x = 3060
x = 3060:153
x = 20
4) 5500 +5/100*5500 =
5500 + 5*5500/100 =
5500 + 27500/100 =
5500 + 275 = 5775 lei
5) 20/3-5/9-8/3 = 60/9-5/9-24/9 = 55/9-24/9 = 31/9
6) 20/2 - 9/3 + 11/6 = 60/6 - 18/6 + 11/6 = 42/6+11/6 = 53/6
7) 53/10 - 20/100 - 7/50 = 530/100 - 20/100 - 14/100=
510/100-14/100 = 496/100 = 248/50 = 124/25