Tolong jawab plisss plisssssss​

17. d. 7. 1/2

18. b. 3. 4/7

Jawaban:

17). D. 7 1/2

18). B. 3 4/7

Penjelasan dengan langkah-langkah:

17). 1 2/5 × 2,5 : 7/15

= 7/5 × 25/10 : 7/15

= 175/50 : 7/15

= 175/50 × 15/7

= 2625/350

= 15/2

= 7 1/2

18). 3 1/5 : 4/5 – 3/7

= 16/5 : 4/5 – 3/7

= 16/5 × 5/4 – 3/7

= 80/20 – 3/7

= 560/140 – 60/140

= 500/140

= 25/7

= 3 4/7