Ответ:
Пошаговое объяснение:
1.
1) 3,91 : (-2,3) = -1,7
2) -2,3 - (-1,7) = -2,3 + 1,7 = -0,6
3) -0,6 : (-0,01) = 60
4) 60 * (-0,7) = -42
3.
1) -11/18 + 29/45 = -55/90 + 58/90 = 3/90 = 1/30
2) 19/27 - 35/54 = 38/54 - 35/54 = 3/54 = 1/18
3) 1/30 : 1/18 = 1/30 * 18/1 = 1/5 * 3/1 = 3/5
2.
1) -11/15 - 7/20 = -44/60 - 21/60 = -65/20 = -13/4
2) -13/4 : (-3 1/4) = -13/4 : (-13/4) = -13/4 * (-4/13) = 1
4.
1) -5,4 : 9/35 = -5 4/10 : 9/35 = -5 2/5 : 9/35 = -27/5 * 35/9 = -3/1 * 7/1 = -21/1 = -21
2) -11 2/9 - (-21) = -11 2/9 + 21 = -11 2/9 + 20 9/9 = 9 7/9
3) 2 1/4 * 9 7/9 = 9/4 * 88/9 = 88/4 = 22
4) -4 1/7 + 22 = -4 1/7 + 21 7/7 = 17 6/7
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Answers & Comments
Ответ:
Пошаговое объяснение:
1.
1) 3,91 : (-2,3) = -1,7
2) -2,3 - (-1,7) = -2,3 + 1,7 = -0,6
3) -0,6 : (-0,01) = 60
4) 60 * (-0,7) = -42
3.
1) -11/18 + 29/45 = -55/90 + 58/90 = 3/90 = 1/30
2) 19/27 - 35/54 = 38/54 - 35/54 = 3/54 = 1/18
3) 1/30 : 1/18 = 1/30 * 18/1 = 1/5 * 3/1 = 3/5
2.
1) -11/15 - 7/20 = -44/60 - 21/60 = -65/20 = -13/4
2) -13/4 : (-3 1/4) = -13/4 : (-13/4) = -13/4 * (-4/13) = 1
4.
1) -5,4 : 9/35 = -5 4/10 : 9/35 = -5 2/5 : 9/35 = -27/5 * 35/9 = -3/1 * 7/1 = -21/1 = -21
2) -11 2/9 - (-21) = -11 2/9 + 21 = -11 2/9 + 20 9/9 = 9 7/9
3) 2 1/4 * 9 7/9 = 9/4 * 88/9 = 88/4 = 22
4) -4 1/7 + 22 = -4 1/7 + 21 7/7 = 17 6/7