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edinorog39
@edinorog39
July 2022
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Используя свойства действия, вычислить наиболее удобным способом :
1)3/5+ 3 3/4+1 2/5 +1 1/4
2) 3,2*5/6*5*6
3)2 1/4*1 1/7*4*7
4)3,81*4,3+6,19*4,3
5)4,7-2,13-5,3-2,87
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svetazuna
1)
3/5+ 3 3/4+1 2/5 +1 1/4 =
(3/5+1 2/5) + (3 3/4+1 1/4) =
1 5/5 + 4 4/4 =
2 + 5 =
7,
2)
3,2*5/6*5*6 =
3,2 * 5 * 5 =
80,
3)
2 1/4*1 1/7*4*7 =
(2 1/4 * 4) * (1 1/7 * 7) =
(9/4 * 4) * (8/7 * 7) =
9 * 8 =
72,
4)
3,81*4,3+6,19*4,3 =
4,3 * (3,81 + 6,19) =
4,3 * 10 =
43,
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Answers & Comments
3/5+ 3 3/4+1 2/5 +1 1/4 =
(3/5+1 2/5) + (3 3/4+1 1/4) =
1 5/5 + 4 4/4 =
2 + 5 = 7,
2)
3,2*5/6*5*6 =
3,2 * 5 * 5 = 80,
3)
2 1/4*1 1/7*4*7 =
(2 1/4 * 4) * (1 1/7 * 7) =
(9/4 * 4) * (8/7 * 7) =
9 * 8 = 72,
4)
3,81*4,3+6,19*4,3 =
4,3 * (3,81 + 6,19) =
4,3 * 10 = 43,