Question

Oblicz, zamieniając na ułamki zwykłe (pamiętaj o skracaniu)

5 + 2/3 =

1,8 - 1 2/3 =

2,5 * 2 2/7 =

2 1/4 : 0,3 =

Answer 1

5/1 + 2/3 = 5 2/3

1,8 - 1 2/3 = 1 4/5 - 1 2/3 = 1 12/15 - 1  10/15=2/15

2,5 *  2 2/7 = 2 1/2 * 16/7 = 5/2 * 16/7 = 40/7 = 5 5/7

2 1/4 : 0,3 = 2 1/4 :3/10 = 9/4 * 10/3 = 15/2 = 7 1/2

 

Answer 2

5 + 2/3 = 5i2/3

1,8-1i2/3= 1 i 4/5 -1 i2/3 = 1i 12/15 - 1 i10/15= 2/15

2,5 * 2 i2/7 = 2 i 1/2 *  2 i2/7 = 5/2 * 16/7 = 5/1 * 8/7 = 40/7 = 5 i 5/7

2 i1/4 : 0,3 = 9/4 : 3/10 = 9/4 * 10/3 = 3/2 * 5/1 = 15/2 = 7 i 1/2

2 i 1/4 : 0,3 = 2,25 : 0,3 = 7,5