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a ) 0,32 x 1 : 0,01 - 15,754
= 0,32 : 0,01 - 15,754
= 32 - 15,754
= 16,246
b ) 48,3 + \(\frac{134}{100}\)+ ( 75,4 - 29,48 ) : 4
= 48,3 + 1,34 + 104,88 : 4
= 48,3 + 1,34 + 26,22
= 49,64 + 26,22
= 75,86
tk mk nha nguyen ngoc linh
thanks@@@@@@@@
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Ta có : \(\frac{134.16-105}{134.15+29}=\frac{134.15+134-105}{134.15+29}=\frac{134.15+29}{134.15+29}=1\)
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\(=\frac{7}{5}-\frac{27}{12}+\frac{3}{5}+\frac{2}{3}+\frac{1}{3}-\frac{3}{4}\)
\(=\frac{7}{5}+\frac{3}{5}+\frac{2}{3}+\frac{1}{3}-\frac{27}{12}-\frac{9}{12}\)
\(=2+1-3=0\)
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a 27:0,1=270
27:10=2,7
b 134:0,1=1340
134:10 =13,4
c 768:0,01 768:100
a) 27:0.,1=270 27:10=2,7
b)134:0,1=1340 134:10=13,4
c)768:0,001=768000 768:100=7,68
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\(A=\left(100\times44+50\times60\right)\times\left(37414,8:1000+2242,52:100\right)\)
\(A=\left(4400+3000\right)\times\left(3741,48\times\frac{1}{100}+2242,52\times\frac{1}{100}\right)\)
\(A=7400\times\left[\frac{1}{100}\times\left(3741,48+2242,52\right)\right]\)
\(A=7400\times\frac{1}{100}\times5984\)
\(A=74\times5984\)
\(B=\left(16\times14,96\times25\right)\times\left(27\times38+19\times146\right)\)
\(B=\left(4\times4\times25\times14,96\right)\times\left(27\times19\times2+19\times146\right)\)
\(B=\left(4\times100\times14,96\right)\times\left[19\times\left(54+146\right)\right]\)
\(B=4\times1496\times19\times200\)
\(B=5984\times19\times200\)
Ta có:
\(\frac{A}{B}=\frac{74\times5984}{5984\times19\times200}\)
\(\frac{A}{B}=\frac{37}{19\times100}\)
\(\frac{A}{B}=\frac{37}{1900}\)
Bài hơi dài, nếu có chỗ nào sai sót thì bạn thông cảm nhé
Cho \(A=\left(100\cdot44+50\cdot60\right)\cdot\left(\frac{37414,8}{1000}+2242,\frac{52}{100}\right)\)
\(B=\left(16\cdot14,96\cdot25\right)\cdot\left(27\cdot38+19\cdot146\right)\)
\(A=\left(100\cdot44+50\cdot2\cdot30\right)\cdot\left(3741,48\cdot\frac{1}{100}+2242,52\cdot\frac{1}{100}\right)\)
\(A=\left\{100.\left(44+30\right)\right\}.\left\{\left(3741,48+2242,52\right)\cdot\frac{1}{100}\right\}\)
\(A=7400\cdot5984\cdot\frac{1}{100}\)
\(A=74\cdot5984\)
\(B=\left(16\cdot14,96\cdot25\right)\cdot\left(27\cdot38+19\cdot146\right)\)
\(B=\left(4\cdot4\cdot14,96\cdot25\right)\cdot\left(27\cdot2\cdot19+19\cdot146\right)\)
\(B=100\cdot4\cdot14,96+\left\{19.\left(146+54\right)\right\}\)
\(B=1496\cdot4+19\cdot200\)
\(B=5984\cdot19\cdot200\)
=>\(\frac{A}{B}=\frac{5984\cdot74}{5984\cdot19\cdot200}\)
\(\frac{A}{B}=\frac{74}{19\cdot200}\)
\(\frac{A}{B}=\frac{37}{19\cdot100}\)( Vì giảm 200 : 2 = 100 . Lấy 74 :2 = 37 . Giảm 2 vế đi 2 lần )
=> A : B = 37/1900
Mình đã thử lại đúng nha bạn !
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a, 27 : 0,1=270 b, 134 : 0,1=1340 c, 768 : 0,01=76800
27 : 10=2,7 134 : 10=13,4 768 : 100=7,68
a, 27 : 0,1=270; b, 134 : 0,1 =1340; c, 768 : 0,01 76800;
27 : 10=2,7 ; 134 : 10=13,4 ; 768 : 100 =7,68.
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