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Ta có:
23 , 24 + 18 + 54 , 3 = 41 , 24 + 54 , 3 = 95 , 54 37 , 8 + 57 , 74 = 95 , 54
Mà 95 , 54 = 95 , 54
Vậy 23 , 24 + 18 + 54 , 3 = 37 , 8 + 57 , 74
Đáp án A
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nếu tính bằng cách thuận tiện thì như vậy nha
=15,24x( 98 + 1 + 1)
15,24x 100
=1524
k mik nha bn
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\(4,7\cdot8+4,7:0,5\)
\(=4,7\cdot8+4.7\cdot2\)
\(=4,7\left(8+2\right)\)
\(=4,7\cdot10=47\)
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a) \(x-34,5=15,24+51,02\)
\(x-34,5=66,26\)
\(x\) \(=\) \(66,26+34,5\)
\(x\) \(=\) \(100,76\)
b) \(x-213,47=221,35+67,145\)
\(x-213,47=288,495\)
\(x\) \(=\) \(288,495+213,47\)
\(x\) \(=\) \(501,965\)
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a \(\dfrac{3}{8}\times\dfrac{5}{2}+\dfrac{5}{8}\times\dfrac{5}{2}=\dfrac{5}{2}\left(\dfrac{3}{5}+\dfrac{5}{8}\right)=\dfrac{5}{2}\times\dfrac{8}{8}=\dfrac{5}{2}\times1=\dfrac{5}{2}\)
b \(33.12\times0=0\)
\(23,24\times5,8-23,24\times4,7-15,24-8\)
\(=23,24\times5,8-23,24\times4,7-\left(15,24+8\right)\)
\(=23,24\times5,8-23,24\times4,7-23,24\)
\(=23,24\times5,8-23,24\times4,7-23,24\times1\)
\(=23,24\times\left(5,8-4,7-1\right)\)
\(=23,24\times0,1\)
\(=23,24:10\)
\(=2,324\)
= 2,324