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\(4^2.102-4^3.17-4^2.34\)
\(=4^2.\left(3.34-2.34-34\right)\)
\(=4^2.34\left(3-2-1\right)\)
\(=4^2.34.0\)
\(=0\)
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a) 80 - ( 4. 5^2 - 3. 2^3 )
= 80 - ( 4.25 - 3.8)
= 80 - ( 100 - 24 )
= 80 - 76
=4
b) 4^2 . 102 - 4^3 . 17 - 4^2 . 34
= 16.102 - 64 . 17 - 16.34
= 1632 - 1088 - 544
= 544 - 544
= 0
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\(4^2.102-4^3.17-4^2.34=4^2.102-4^2.68-4^2.34=16.\left(102-68-34\right)=16.0=0\)
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I don't now
mik ko biết
sorry
......................
a. 42 x 102 - 43 x 17 - 42 x 34
= 42 x (102 - 4 x 17 -34)
= 42 x 0
= 0
b. 73 x 9 + 32 x 74 - 45 x 539
= 3087 + 21609 - 24255
= 24696 - 24255
= 441
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a,\(2,5.16,27.4+7,3=16,27.10+7,3=162,7+7,3=170\)
b,\(8.6.10+4.25.12+3.16.31+2.34.24=48.10+48.25+48.31+48.34\)
\(=48.\left(10+25+31+34\right)=48.100=4800\)
c,\(78.31+78.24+78.17+22.72=78\left(31+24+17\right)+22.72=78.72+22.72\)
\(=72.\left(78+22\right)=72.100=7200\)
d,\(102.67-34.51=102.67-17.102=102.\left(67-17\right)=102.50=5100\)
đéo hiểu thì cút nhé đéo ai khiến m trả lời cả . ngu thì nói ngu đi đừng bày đặt t ghét nhất là cái loại như m đấy ạ
Bài 2
a, \(1-\left(12,5+x-4,25\right):21,75=0\)
\(=>21,75-12,5-x+4,25=0\)
\(=>13,5-x=0=>x=13,5\)
b,\(x.101-x+72.99+72=21050\)
\(=>100x+72.100=21050\)
\(=>100\left(x+72\right)=21050\)
\(=>x+72=210,5\)\(=>x=138,5\)
c,\(151-2\left(x-6\right)=2227:17\)
\(=>151-2\left(x-6\right)=131\)
\(=>2\left(x-6\right)=20\)
\(=>2x=32=>x=16\)
d,\(\left(x+4\right)+\left(x+6\right)+\left(x+8\right)+...+\left(x+26\right)=210\)\(=>12x+\left(4+6+8+...+26\right)=210\)
\(=>12x+180=210=>12x=30\)
\(=>x=\frac{30}{12}=\frac{15}{6}=\frac{5}{2}\)
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