Question

Uzupełnij:

a) ___ x 3/4 = 2/5
b) 1 i 1/5 x___= 1/2
c) 9/10 x_____= 1 i 1/2

Answer 1

a)8/15 x 3/4 = 2/5
b) 1 i 1/5 x 5/12= 1/2
c) 9/10 x 1 2/3= 1 i 1/2

obliczenia
2/5 : 3/4=2/5 * 4/3=8/15
1/2 : 1 1/5=1/2 : 6/5=1/2 * 5/6=5/12
1 1/2 : 9/10=3/2 * 10/9=30/18= 1 12/18=1 2/3

Answer 2

X * 3/4 = 2/5

x= 2/5 : 3/4

x= 2/5 * 4/3 

x= 8/15


spr.

8/15 * 3/4 = 2/5

2/5 * 1/1= 2/5

2/5= 2/5

L=P



1 i 1/5 * x = 1/2

x= 1/2 : 1 i 1/5

x= 1/2 : 6/5

x= 1/2 * 5/6

x= 5/12


spr.

1 i 1/5 * 5/12  = 1/2

6/5 * 5/12= 1/2

1/1 * 1/2 = 1/2

1/2 = 1/2

L=P




9/10 * x= 1 i 1/2

x= 1 i 1/2 : 9/10

x= 3/2 : 9/10

x= 3/2 * 10/9

x= 1/1 * 5/3

x= 5/3

x= 1 i 2/3


spr.

9/10 * 1 i 2/3 = 1 i 1/2

9/10 * 5/3 = 1 i 1/2

3/2 * 1/1 = 1 i 1/2

1 i 1/2 = 1 i 1/2

L =P