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a. 0.25 x 5.48 x 40 b. 7.48 + 7.48 x 99
=(0.25 x 40) x 5.48 =7.48 x 1 +7.48 x 99
=10 x 5.48 = 54.8 =7.48 x(1 + 99) =7.48 x 100 = 748
Mình làm chuẩn đó. mình nha!!!
a) 0,25x5,87x40=(0,25x40)x5,87=10x5,87=58,7
b) 7,48+7,48x99=7,48x(1+99)=7,48x100=748
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= 25 x 75/100 + 75 x 0.92 + 25 x 0.25 + 75 x 8/100
= 25 x 0.75 + 75 x 0.92 + 25 x 0.25 + 75 x 0.08
= 25 x ( 0.75 + 0.25 ) + 75 x ( 0.92 + 0.08 )
= 25 x 1 + 75 x 1
= ( 25 + 75 ) x 1
= 100 x 1
= 100
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0,9 : 0,25 + 1.05 : 0,25
= (0,9+ 1,05) : 0,25
=0,4875
tk mk nha bn
Mình nghĩ giải thế này:
(0.9+1.05):0.25
=1.95:0.25
=7.8
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48,5:4 + 51,5 \(\times\) 0,25 + 1,5
= 48,5 \(\times\) 0,25 + 51,5 \(\times\) 0,25 + 1,5
= 0,25 \(\times\)( 48,5 + 51,5) + 1,5
= 0,25 \(\times\) 100 + 1,5
= 25 + 1,5
= 26,5
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\(\dfrac{1}{10}+\dfrac{1}{2}:0,5-\dfrac{1}{4}:0,25+\dfrac{1}{8}:0,125\)
\(=\dfrac{1}{10}+\dfrac{1}{2}\times2-\dfrac{1}{4}\times4+\dfrac{1}{8}\times8\)
\(=\dfrac{1}{10}+1-1+1\)
\(=\dfrac{1}{10}+1=\dfrac{1}{10}+\dfrac{10}{10}=\dfrac{11}{10}\)
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13, 25 : 0, 5 + 13, 25 : 0, 25 + 13, 25 : 0, 125
= 13, 25 . 2 + 13, 25 . 4 + 13, 25 . 8
= 13, 25 . ( 2 + 4 + 8 )
= 13, 25 . 14
= 185, 5
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ta có: A:0.25=A x 4
Ta có
A)(40.7-17.5)x4
=23.2x4=92.8
B)ko biết:)))))))))))))))))))))))))))
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=0 bn ơi
9,83:1,25:8+10,23:40:0,25
= 9,83 : ( 1.25.8 ) + 10 , 23 : ( 40 . 0.25 )
= 9 , 83 : 10 + 10,23 : 10
= ( 9,83 + 10,23 ) : 10
= 20,06 : 10
= 200,6