Ответ:
Пошаговое объяснение:
КР - 3 . Вар - 1 .
1 . 1) 37/88 * 24/37 = 3/11 ; 2) 7 7/8 * 5/7 = 63/8 * 5/7 = 45/8 = 5 5/8 ;
3) 6 * 19/24 = 19/4 = 4 3/4 .
2 . a = 2 5/8 м ; b = 1 1/21 *a = 1 1/21 * 2 5/8 = 22/212 * 21/8 = 11/4 = 2 3/8 ( м ) ;
S = a*b ; S = 2 5/8 * 2 3/8 = 21/8 * 19/8 = 399/64 = 6 15/64 ( кв. см ) ;
S = 6 15/64 кв. см . В - дь : 6 15/64 кв. см .
3 . ( 3 1/6 + 4 5/6 * 11/29 ) * 1 1/15 = 5 1/3 .
1) 4 5/6 * 11/29 = 29/6 * 11/29 = 11/6 = 1 5/6 ;
2) 3 1/6 + 1 5/6 = 4 6/6 = 5 ; 3) 5 * 1 1/15 = 5/1 * 16/15 = 16/3 = 5 1/3 .
4 . а = 8 1/5 см , с = 0,05 * а = 5/100 * 8 1/5 = 1/20 * 41/5 = 41/100 ( см ) ;
b = 1 2/41 * c = 43/41 * 41/100 = 43/41 * 41/100 = 43/100 ( см ) .
V = a*b*c ; V = 8 1/5 * 43/100 * 41/100 = 41/5 * 43/100 * 41/100 =
= 72283/50000 = 1 22283/50000 ( см³ ) .
В - дь : 1 22283/50000 см³ .
5 . 3 1/14 * 9 1/3 + 13/28 * 9 1/3 - 9 1/3 * 1 2/7 = 9 1/3 * ( 3 1/14 + 13/28 -
- 1 2/7 ) = 9 1/3 *2 7/28 = 28/3 * 63/28 = 21 .
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Answers & Comments
Ответ:
Пошаговое объяснение:
КР - 3 . Вар - 1 .
1 . 1) 37/88 * 24/37 = 3/11 ; 2) 7 7/8 * 5/7 = 63/8 * 5/7 = 45/8 = 5 5/8 ;
3) 6 * 19/24 = 19/4 = 4 3/4 .
2 . a = 2 5/8 м ; b = 1 1/21 *a = 1 1/21 * 2 5/8 = 22/212 * 21/8 = 11/4 = 2 3/8 ( м ) ;
S = a*b ; S = 2 5/8 * 2 3/8 = 21/8 * 19/8 = 399/64 = 6 15/64 ( кв. см ) ;
S = 6 15/64 кв. см . В - дь : 6 15/64 кв. см .
3 . ( 3 1/6 + 4 5/6 * 11/29 ) * 1 1/15 = 5 1/3 .
1) 4 5/6 * 11/29 = 29/6 * 11/29 = 11/6 = 1 5/6 ;
2) 3 1/6 + 1 5/6 = 4 6/6 = 5 ; 3) 5 * 1 1/15 = 5/1 * 16/15 = 16/3 = 5 1/3 .
4 . а = 8 1/5 см , с = 0,05 * а = 5/100 * 8 1/5 = 1/20 * 41/5 = 41/100 ( см ) ;
b = 1 2/41 * c = 43/41 * 41/100 = 43/41 * 41/100 = 43/100 ( см ) .
V = a*b*c ; V = 8 1/5 * 43/100 * 41/100 = 41/5 * 43/100 * 41/100 =
= 72283/50000 = 1 22283/50000 ( см³ ) .
В - дь : 1 22283/50000 см³ .
5 . 3 1/14 * 9 1/3 + 13/28 * 9 1/3 - 9 1/3 * 1 2/7 = 9 1/3 * ( 3 1/14 + 13/28 -
- 1 2/7 ) = 9 1/3 *2 7/28 = 28/3 * 63/28 = 21 .