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Rikoxa4240
@Rikoxa4240
December 2021
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помогите 587(б)
589 и 590
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sagirovna
№587(б)
17 1/2= 35/2
2 3/4= 11/4
35/2 - 11/4 = (70-11)/4 = 59/4 км/ч - скорость лодки
59/4 - 11/4 = (59-11)/4 = 48/4 = 12 км/ч - скорость лодки против течения.
№589
1 -1/2= (2-1)/2 = 1/2; 2 -1/3= (6-1)/3 = 1 2/3; 3 -1/4= (12-1)/4 = 2 3/4;
4 -1/5= 3 4/5; 5 -1/6 = 4 5/6; 6 -1/7 = 5 6/7; 7 -1/8 = 6 7/8; 100 -1/101 = 99 100/101
№590 (1)
3 1/2 + 4 1/2 = 7/2 + 9/2 = 16/2 = 8
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Answers & Comments
17 1/2= 35/2
2 3/4= 11/4
35/2 - 11/4 = (70-11)/4 = 59/4 км/ч - скорость лодки
59/4 - 11/4 = (59-11)/4 = 48/4 = 12 км/ч - скорость лодки против течения.
№589
1 -1/2= (2-1)/2 = 1/2; 2 -1/3= (6-1)/3 = 1 2/3; 3 -1/4= (12-1)/4 = 2 3/4;
4 -1/5= 3 4/5; 5 -1/6 = 4 5/6; 6 -1/7 = 5 6/7; 7 -1/8 = 6 7/8; 100 -1/101 = 99 100/101
№590 (1)
3 1/2 + 4 1/2 = 7/2 + 9/2 = 16/2 = 8