Question

(3 4/25+20,24)*2,15+(5,1625-2 3/16)*2/5

Answer 1

Ответ:

(3 4/25+20,24)*2,15+(5,1625-2 3/16)*2/5 = 51,3052

1) 3 4/25 + 20,24 = 3 4/25 + 20 24/100 = 3 16/100 + 20 24/100 = 23 40/100 = 23 4/10 = 23 2/5

2) 5,1635 - 2 3/16 = 5 1635/10000 - 2 3/16 = 5 327/2000 - 2 3/16 = 5 327/2000 - 2 375/2000 = 2 1952/2000 = 2 488/1000 = 2 122/250 = 2 61/125

3) 23 2/5 * 2,15 = 23,4 * 2,15 = 50,31

4) 2 61/125 * 2/5 = 2 61/125 * 0,4 = 2,488 * 0,4 = 0,9952

5) 50,31 + 0,9952 = 50,3100 + 0.9953 = 51,3052

Answer 2

Ответ:51,5

Пошаговое объяснение:

(3целых 4/25 + 20,24) × 2,15 + (5,1625 - 2целых 3/16) × 2/5 = 51,5

1) 3целых 4/25 + 20,24 = 3,16 + 20,24 = 23,4

2) 23,4×2,15=50,31

3) 5,1625 - 2целых 3/16 = 5целых 13/80 - 2целых 15/80 = 4целых 93/80 - 2целых 15/80 =2целых 78/80 = 2целых 39/40

4) 2целых 39/40 × 2/5 = 119/40 × 2/5 = 119/20 × 1/5 = 119/100 = 1,19

5) 50,31+1,19=51,5