Question

Выполните действия номер 4

Answer 1

А)) 3 3/4+ 1 1/2= 3 3/4+ 1 (1•2)/(2•2)=
3 3/4+ 1 2/4= 4 5/4= 5 1/4

Б)) 2 5/6- 1 5/12= 2 (5•2)/(6•2)- 1 5/12=
2 10/12- 1 5/12= 1 5/12

В)) 4 - 1 2/3= 3 3/3- 1 2/3= 2 1/3

Г)) 3 2/7- 6/7= 2 (7•1+2)/7 - 6/7=
2 9/7- 6/7= 2 3/7

Д)) 1 1/3• 4= (1•3+1)/3 • 4/1=
4/3• 4/1= (4•4)/(3•1)= 16/3= 5 1/3

Е)) 3 1/4• 2/5= (3•4+1)/4• 2/5=
13/4• 2/5= (13•2)/(4•5)= 26/20=
1 6/20= 1 3/10
Сократили 6/20 на 2.

Ж)) 2 1/4 :3= (2•4+1)/4 • 1/3=
9/4• 1/3= (9•1)/(4•3)= (3•1)/(4•1)= 3/4
Сократили 9 и 3 на 3.

З)) 20 : 2 1/2= 20/1 : (2•2+1)/2=
20/1 : 5/2= 20/1• 2/5= (20•2)/(1•5)=
(4•2)/(1•1)= 8/1= 8
Сократили 20 и 5 на 5.