Question

(2-1 целая 7/12)÷(3/8-1/6)×3целых 1/4

Answer 1

3)) { 2- 1 7/12 } : { 3/8 - 1/6} • 3 1/4=
6 1/2= 6,5.


1)) 2- 1 7/12= 1 12/12- 1 7/12= 5/12

2)) 3/8- 1/6= (3•3)/(8•3)- (1•4)/(6•4)=

9/24 - 4/24= 5/24

3)) 5/12: 5/24• 3 1/4=

5/12• 24/5• (3•4+1)/4=

{сокращаем 5 и 5 на 5; 12 и 24 на 12}

1/1• 2/1• 13/4=

{сокращаем 2 и 4 на 2}

1/1• 1/1• 13/2= 13/2= 6 1/2= 6,5.





4)) {7/10 - 2/5} • {1/4+ 5/6} : 6 1/2=

1/20= 0,05


1)) 7/10- 2/5= 7/10- (2•2)/(5•2)=

7/10- 4/10= 3/10

2)) 1/4+ 5/6= (1•3)/(4•3)+ (5•2)/(6•2)=

3/12+ 10/12= 13/12

3)) 3/10• 13/12 : 6 1/2=

{сокращаем 3 и 12 на 3}

1/10• 13/4: (6•2+1)/2=

1/10• 13/4: 13/2=

1/10• 13/4• 2/13=

{сокращаем 13 и 13 на 13; 4 и 2 на 2}

1/10• 1/2• 1/1= 1/20= 0,05.

Answer 2

(2-17/12) /(3/8 -1/6) *31/4 =61/2
1)2 -1 7/12 = 1 12/12 -1 7/12 =5/12
2)3/8 - 1/6 = 9-4/24 = 5/24
3)5/12 /5/24 = 5/12 * 24/5 = 2
4) 3 1/4 * 2 = 6 2/4 = 6 1/2