обратите в десятичные дроби 9/20 7/40 11/400 21/168 35/280 47/376

Question

обратите в десятичные дроби 9/20 7/40 11/400 21/168 35/280 47/376

Answer 1

9/20 = (9*5)/(50*5) = 45/100 = 0,45

7/40 = (7*25)/(40*25) = 45/100 = 0,175

11/400 =(11*25)/(400*25) = 275/10000 = 0,0275

21/168 = (21:21)/(168:21) = 1/8 = (1*125)/(8*125) =0,125

35/280 = (35:35)/(280:35) = 1/8 =0,125

47/376 = (47:47)/(376:47) = 1/8 =0,125

Answer 2

9/20=0.45; 7/40=0,175;  11/400 =0,0275;  21/168=0,125; 35/280=0,125; 47/376=0,125