Ответ:
Задание 1:
1) x/(3/10+3/5)=1
x/(3/10+6/10)=1
x/(9/10)=1
x=1×(9/10)
x=9/10
2) x/19=4/38+14/19
x/19=4/38+28/38
x/19=34/38
x=34/38×19
X=17
Задание 2:
1) (2/7+7/2)×14/3=(4/14+49/14)×14/3=53/14×14/3=53/3=17целых и 2/3
2)(21/5-11/4)×40/19=(84/20-55/20)×40/19=29/20×40/19=29×2/19=58/19= 3целых и 1/19
3)(41/7+68/21)×21/10=(123/21+68/21)×21/10=191/21×21/10=191/10=19,1
4) (89/12-19/6)×36/17=(89/12-38/12)×36/17=51/12×36/17=51×3/17=153/17=9
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Ответ:
Задание 1:
1) x/(3/10+3/5)=1
x/(3/10+6/10)=1
x/(9/10)=1
x=1×(9/10)
x=9/10
2) x/19=4/38+14/19
x/19=4/38+28/38
x/19=34/38
x=34/38×19
X=17
Задание 2:
1) (2/7+7/2)×14/3=(4/14+49/14)×14/3=53/14×14/3=53/3=17целых и 2/3
2)(21/5-11/4)×40/19=(84/20-55/20)×40/19=29/20×40/19=29×2/19=58/19= 3целых и 1/19
3)(41/7+68/21)×21/10=(123/21+68/21)×21/10=191/21×21/10=191/10=19,1
4) (89/12-19/6)×36/17=(89/12-38/12)×36/17=51/12×36/17=51×3/17=153/17=9