Tolong bantu jawab dan jelaskan cara pengerjaanya . sebelumnya terimakasih ​

a) 1¼ – ⅗ = 4 x 1 + 1 – ⅗

4

= 5/4 – 3/5

= 5 x 5 – 3 x 4

4 x 5

= 25 – 12 = 13/20

20

b) 1¼ x ½ = 4 x 1 + 1 x ½

4

= 5/4 x 1/2

= 5 x 1 = 5/8

4 x 2

c) 4 : ⅖ = 4/1 : 2/5

= 4/1 x 5/2

= 4 x 5 = 20/2 = 10/1 = 10

1 x 2

d) 5 : 1⅓ = 5/1 : 3 x 1 + 1

3

= 5/1 : 4/3

= 5/1 x 3/4

= 5 x 3

1 x 4

= 15/4 = 3¾