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a: \(\left(\frac23-25\%\right)\cdot\left(-\frac25\right)^2-\left(1\frac25+1\frac13-2\right)\)

\(=\left(\frac23-\frac14\right)\cdot\frac{4}{25}-\left(1+\frac25+1+\frac13-2\right)\)

\(=\frac{5}{12}\cdot\frac{4}{25}-\left(\frac25+\frac13\right)\)

\(=\frac{20}{300}-\frac{11}{15}=\frac{1}{15}-\frac{11}{15}=-\frac{10}{15}=-\frac23\)

b: \(\left(\frac72+50\%\right)\cdot10-\left(3,6:2\frac25\right)^3\cdot\left(-\frac{2023}{2024}\right)^0\)

\(=\left(\frac72+\frac12\right)\cdot10-\left(\frac{18}{5}:\frac{12}{5}\right)^2\)

\(=4\cdot10-\left(\frac32\right)^2=40-2,25=37,75\)

24 tháng 8

24 tháng 8

=(2,75-2,25)-0.6=0,5-0,6=-0,1


24 tháng 8

24 tháng 8

- 0,1

 Cho A =122122+124124+126126+....+1210012100.C/minh A...
Đọc tiếp

 

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0
 Cho A =122122+124124+126126+....+1210012100.C/minh A...
Đọc tiếp

 

Cho A =122" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-table; float:none; font-size:20.34px; font-style:normal; font-weight:normal; letter-spacing:normal; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; text-align:left; text-indent:0px; text-transform:none; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">122+124" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-table; float:none; font-size:20.34px; font-style:normal; font-weight:normal; letter-spacing:normal; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; text-align:left; text-indent:0px; text-transform:none; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">124+126" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-table; float:none; font-size:20.34px; font-style:normal; font-weight:normal; letter-spacing:normal; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; text-align:left; text-indent:0px; text-transform:none; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">126+....+12100" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-table; float:none; font-size:20.34px; font-style:normal; font-weight:normal; letter-spacing:normal; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; text-align:left; text-indent:0px; text-transform:none; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">12100.C/minh A <13" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-table; float:none; font-size:20.34px; font-style:normal; font-weight:normal; letter-spacing:normal; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; text-align:left; text-indent:0px; text-transform:none; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">

 

0
6 tháng 8 2015

= l ( 99 + -99 ) + ( -98 + 98 ) +... + (-1+ 1 ) + -100l

= l 0 + 0 + .. + 0 + -100 l 

= l -100l

= 100

24 tháng 3 2017

ket qua cua con tinh la 100 nha