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bahytnur010203
@bahytnur010203
July 2022
1
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Выполните действия!
1)3 целых 1/4+6,4+7,5=
2)(21,3- 18 целых 3/4)\ 3,4=
3)2/11 * ( 14 целых 1/3 +2 целых 1/6)=
4) ( 5 целых 1/6-3,25)* 4/23=
5) 16,5 делить 2,75 -1/19 *57=
6) 2 целых 1/7 делить 5/6 * 7/9 -1,9=
помогите пожалуйста
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Answers & Comments
ketlin25
1) 3 1/4 +6,4 +7,5 = 13/4+6,4+7,5 = 3,25+6,4+7,5= 17,15
2) (21,3 - 18 3/4) : 3,4 = (21,3 - 75/4) : 3,4 = (21,3 - 18,75) : 3,4 = 2,55 : 3,4 = 0,75
3) 2/11 * (14 1/3 + 2 1/6) = 2/11 * ( 43/3 + 13/6) = 2/11 * (
43*2 + 13
) = 2/11 * 99/6
6
= 2/11 * 33/2 =
2*33
= 3
11*2
4) (5 1/6 - 3,25)* 4/23 = (31/6 - 3 1/4) * 4/23 = (31/6 - 13/4) * 4/23 =
= (
31*2 - 13*3
) * 4/23 =
(62 - 39)
* 4/23 = 23/12 * 4/23 =
23 * 4
= 1/3
12 12
12 * 23
5) 16,5 : 2,75 - 1/19*57 = 6 -
1*57
= 6 - 3 = 3
19
6)
2 1/7 : 5/6 * 7/9 - 1,9 = 15/7 : 5/6 * 7/9 - 1,9 =
15 * 6 * 7
- 1,9 = 2 - 1,9 = 0,1
7 * 5 * 9
11 votes
Thanks 28
кармм
Спасибо
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Answers & Comments
2) (21,3 - 18 3/4) : 3,4 = (21,3 - 75/4) : 3,4 = (21,3 - 18,75) : 3,4 = 2,55 : 3,4 = 0,75
3) 2/11 * (14 1/3 + 2 1/6) = 2/11 * ( 43/3 + 13/6) = 2/11 * ( 43*2 + 13 ) = 2/11 * 99/6
6
= 2/11 * 33/2 = 2*33 = 3
11*2
4) (5 1/6 - 3,25)* 4/23 = (31/6 - 3 1/4) * 4/23 = (31/6 - 13/4) * 4/23 =
= (31*2 - 13*3) * 4/23 = (62 - 39) * 4/23 = 23/12 * 4/23 = 23 * 4 = 1/3
12 12 12 * 23
5) 16,5 : 2,75 - 1/19*57 = 6 - 1*57 = 6 - 3 = 3
19
6) 2 1/7 : 5/6 * 7/9 - 1,9 = 15/7 : 5/6 * 7/9 - 1,9 = 15 * 6 * 7 - 1,9 = 2 - 1,9 = 0,1
7 * 5 * 9