Câu hỏi của Mai Hang

Question

tính giá trị cua biểu thuc sau 9/2:(2.5-15/4)+(-1/2)^2

Bùi MInh · Accepted Answer

$\frac{9}{2}:\left(2.5-\frac{15}{4}\right)+\left(\frac{-1}{2}\right)^2$$=\frac{9}{2}:\left(10-\frac{15}{4}\right)+\frac{1}{4}$$=\frac{9}{2}:\left(\frac{40}{4}-\frac{15}{4}\right)+\frac{1}{4}$$=\frac{9}{2}:\frac{25}{4}+\frac{1}{4}$$=\frac{9}{2}.\frac{4}{25}+\frac{1}{4}$$=\frac{18}{25}+\frac{1}{4}$$=\frac{97}{100}$Câu trả lời: $\frac{9}{2}:\left(2.5-\frac{15}{4}\right)+\left(\frac{-1}{2}\right)^2$$=\frac{9}{2}:\left(10-\frac{15}{4}\right)+\frac{1}{4}$$=\frac{9}{2}:\left(\frac{40}{4}-\frac{15}{4}\right)+\frac{1}{4}$$=\frac{9}{2}:\frac{25}{4}+\frac{1}{4}$$=\frac{9}{2}.\frac{4}{25}+\frac{1}{4}$$=\frac{18}{25}+\frac{1}{4}$$=\frac{97}{100}$

Yaichi Miku · Answer

$\frac{9}{2}\div\left(2\times5-\frac{15}{4}\right)+\left(\frac{-1}{2}\right)^2$$=\frac{9}{2}\div\left(10-\frac{15}{4}\right)+\left(\frac{-1}{2}\right)^2$$=\frac{9}{2}\div\left(\frac{40-15}{4}\right)+\frac{1}{4}$$=\frac{9}{2}\div\frac{25}{4}+\frac{1}{4}$$=\frac{9}{2}\times\frac{4}{25}+\frac{1}{4}$$=\frac{18}{25}+\frac{1}{4}$$=\frac{72+25}{100}=\frac{97}{100}$Câu trả lời: $\frac{9}{2}\div\left(2\times5-\frac{15}{4}\right)+\left(\frac{-1}{2}\right)^2$$=\frac{9}{2}\div\left(10-\frac{15}{4}\right)+\left(\frac{-1}{2}\right)^2$$=\frac{9}{2}\div\left(\frac{40-15}{4}\right)+\frac{1}{4}$$=\frac{9}{2}\div\frac{25}{4}+\frac{1}{4}$$=\frac{9}{2}\times\frac{4}{25}+\frac{1}{4}$$=\frac{18}{25}+\frac{1}{4}$$=\frac{72+25}{100}=\frac{97}{100}$

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