2 câu trả lời
`( 2 2/3 + 2 2/4 ) - 1 2/3 + 5%`
`= 2 2/3 + 2 2/4 - 1 2/3 + 1/20`
`= ( 2 2/3 - 1 2/3 ) + 5/2 + 1/20`
`= 1 + 5/2 + 1/20`
`= 7/2 + 1/20`
`= 70/20 + 1/20`
`= 71/20`
Đáp án:
$\left(2\dfrac23+2\dfrac24\right)-1\dfrac23+5\%\\=2\dfrac23+2\dfrac24-1\dfrac23+5\%\\=\left(2\dfrac23-1\dfrac23\right)+2\dfrac24+\dfrac1{20}\\=1+\dfrac{10}4+\dfrac1{20}\\=\dfrac72+\dfrac1{20}\\=\dfrac{71}{20}$
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