знайди значения виразу.
/=риска дробу
#1
1/2+2/3+3/4=?
7/8+1/6-2/3=?
9/10-3/5+5/7=?
5/24-1/60-1/40=?
5/14+10/21-3/4=?
5/6-3/16+5/12=?
(7/10+3/5)-(1/6+2/3)=?
2/3-(1/20+2/9)-5/18=?
1/3+1/4+1/5+1/6+1/7=?
#2
х+3/20=5/12+2/9
5/7-у=1/54+1/9+10/27
3/4+(5/8+т)=11/12+7/8
(4/5-к)-1/3=1/6-1/10
Ответы
Ответ:
Пошаговое объяснение:
1.
1/2 +2/3 +3/4=2/4 +3/4+2/3=15/12 +8/12=1 11/12
7/8 +1/6 -2/3=7/8 +1/6 -4/6=7/8 -4/8=3/8
9/10 -3/5 +5/7=9/10 -6/10 +5/7=21/70 +50/70=1 1/70
5/24 -1/60 -1/40=25/120 -2/120 -3/120=1/6
5/14 +10/21 -3/4=15/42 +20/42 -3/4=10/12 -9/12=1/12
5/6 -3/16 +5/12=10/12 +5/12 -3/16=20/16 -3/16=1 1/16
(7/10 +3/5)-(1/6 +2/3)=7/10 +3/10 -1/6 -4/6=1 -5/6=6/6 -5/6=1/6
2/3 -(1/20 +2/9) -5/18=12/18 -4/18 -5/18 -1/20=10/60 -3/60=7/60
1/3 +1/4 +1/5 +1/6 +1/7=4/12 +3/12 +2/12 +7/35 +5/35=3/4 +12/35=105/140 +48/140=1 13/140
2.
x +3/20=5/12 +2/9
x=15/36 +8/36 -3/20=115/180 -27/180=22/45
5/7 -y=1/54 +1/9 +10/27
y=5/7 -1/54 -6/54 -20/54=5/7 -1/2=10/14 -7/14=3/14
3/4 +(5/8 +t)=11/12 +7/8
t=11/12 +7/8 -6/8 -5/8=11/12 -6/12=5/12
(4/5 -k) -1/3=1/6 -1/10
k=8/10 +1/10-2/6 -1/6=9/10 -1/2=0,9-0,5=0,4