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ryazanova1961
@ryazanova1961
June 2022
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Помогите срочно!
1)2 целый 3/7 умножить на 7=?
2)5/12 умножить на 2 целых 3/7 + 5/12 умножить на 3 целых 4/7 =?
3)(3 целых 1/2х - 1/4)8=3
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555Алиса1996
5/12*17/7+5/12*25/7 =5/12(17/7+25/7)=5/12*6=5/2=2,5
2 votes
Thanks 2
555Алиса1996
1)17
946325
1) 2 3/7 *7=2*7+3/7 *7= 14+3=17
2) 5/12 * 2 3/7 +5/12 *3 4/7=5/12*(2 3/7+3 4/7)=5/12 * 6=5/2=2 1/2
3) (3 1/2x-1/4)8=3
3 1/2x* 8 - 1/4 *8 =3
28x -2=3
28x=5
x=5/28
4 votes
Thanks 4
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Answers & Comments
2) 5/12 * 2 3/7 +5/12 *3 4/7=5/12*(2 3/7+3 4/7)=5/12 * 6=5/2=2 1/2
3) (3 1/2x-1/4)8=3
3 1/2x* 8 - 1/4 *8 =3
28x -2=3
28x=5
x=5/28