Răspuns:
Explicație pas cu pas:
1). 7/8=77/88
2). 12/16=6/8=3/4
3). 75/4=7x4+5=28+5=33
4). 3/11+4/11+5/11=12/11
5). 4/3-7/3=16/12-7/12=9/12=3/4
6). 4/5*5/2=2
7). 7/6:21/22=7/6*22/21=11/9
8). 4/7 din 21/36=4/7*21/36=3/9=1/3
9). 24% din 1500=24/100*1500=24*15=360
10).75/4=18 3/4
11). [tex]\frac{3}{4} :(\frac{3}{4} -\frac{1}{2} )-\frac{4}{9} =\frac{3}{4} :(\frac{3}{4} -\frac{2}{4})-\frac{4}{9} =\frac{3}{4} :\frac{4}{1} -\frac{4}{9} =\frac{3}{1} -\frac{4}{9} =\frac{27}{9} -\frac{4}{9} =\frac{33}{9} =\frac{11}{3}[/tex]
12).
a). (7/3)^5*(7/3)^4:(7/3)^6=16807/243*2401/81:117649/729
=16807/243*2401/81*729/117649
=2401*2401/9*1/117649
=2401/9*49
=49/9
b). (5/13)^2*(26/15)^2:(2/5)^2
=25/169*676/225:4/25
=25/169*676/225*25/4
=25/9
13)200:100x10=20
200+20=220 lei
