(3целых7/25+2,72)×5/24
15/16:3целых3/4-2/9-
(0,36+0,224/0,35)×5
(5,85:1целая19/20-2целых5/9):4 ПОМОГИТЕ СРОЧНО
15/16:3целых3/4-2/9-
(0,36+0,224/0,35)×5
(5,85:1целая19/20-2целых5/9):4 ПОМОГИТЕ СРОЧНО
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(3 7/25 + 2,72 ) × 5/24 = (3,28 + 2,72) × 5/24 == 6 × 5/24 = 5/4 = 1 1/4 = 1,25
по действиям:
1) 3 7/25 + 2,72 = 3 28/100 + 2,72 = 3,28 + 2,72 =6
2) 6 × 5/24 = 6/1 × 5/24 = (1×5)/(1×4) = 5/4 = 1 1/4 = 1,25
15/16 : 3 3/4 - 2/9 = 15/16 × 4/15 - 2/9 =
= 1/4 - 2/9 =9/36 - 8/36 = 1/36
по действиям:
1) 15/16 : 3 3/4 = 15/16 : 15/4 = 15/16 × 4/15 = 4/16 = 1/4
2) 1/4 - 2/9 = (1×9)/(4×9) - (2×4)/(9×4) = 9/36 - 8/36 = 1/36
(0,36 + (0,224/35) ) × 5 = (0,36 +0,0064) ×5 = 0,3664 ×5= 1,832
или если (0,36 +0,224) - числитель дроби :
( (0,36 +0,224) /35 ) × 5 = 0,584/35 × 5 = 584/35000 × 5 =
=73/4375 × 5/1= 73/875
(5,85 : 1 19/20 - 2 5/9 ) : 4 = (5,85 : 1,95 - 2 5/9) : 4 =
= (3 - 2 5/9 ) : 4 = 4/9 : 4 =4/9 × 1/4 = 1/9
по действиям:
1) 5,85 : 1 19/20 = 5,85 : 1 95/100 = 5,85 : 1,95 = 585:195=3
2) 3 - 2 5/9 = 27/9 - 23/9 = 4/9
3) 4/9 : 4 = 4/9 : 4/1 = 4/9 × 1/4 = 1/9