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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: bài 1 rính hợp lý nếu có thể a) -0,:25÷1\4+|3\4+5\3|-9×√25\81+√(-5)mũ 2

Toán Lớp 7: bài 1 rính hợp lý nếu có thể a) -0,:25÷1\4+|3\4+5\3|-9×√25\81+√(-5)mũ 2

Comments ( 1 )

  1. Giải đáp:
    $a. – 0,25 : \frac{1}{4} + | \frac{3}{4} + \frac{5}{3} | – 9.\sqrt[]{\frac{25}{81}} + \sqrt[]{(-5)^{2}}$
    $= – \frac{25}{100} . 4 + | \frac{9}{12} + \frac{20}{12} | – 9.\sqrt[]{(\frac{5}{9})^{2}} + \sqrt[]{5^{2}}$
    $= -\frac{25}{25.4} . 4 + \frac{29}{12} – 9.\frac{5}{9} + 5$
    $= – 1 + \frac{29}{12} – 5 + 5$
    $= – 1 + \frac{29}{12}$
    $= – \frac{12}{12} + \frac{29}{12}$
    $= \frac{17}{12}$

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222-9+11+12:2*14+14 = ? ( )