MATH!急!!PLZ @ nzphddr的部落格

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MATH!急!!PLZ

發問:

1.(-52)/[(+2)X(-13)] 2.(-12)X[(-20)/(-4)] 3.(+100)/[(-2)X(+5)] 4.(-7.2)/[(-3.6)X(+5)] 要寫步X!

最佳解答:

1.(-52)/[(+2)X(-13)] =(-52)/(-26) =2 2.(-12)X[(-20)/(-4)] =(-12)/5 =(-2.4) 3.(+100)/[(-2)X(+5)] =100/(-10) =(-10) 4.(-7.2)/[(-3.6)X(+5)] =(-7.2)/(-18) =0.25

其他解答:

1.(-52)/[(+2)X(-13)] = (-52)/(-26) = 2 2.(-12)X[(-20)/(-4)] = (-12)X(5) = -60 3.(+100)/[(-2)X(+5)] =(+100)/(-10) =-10 4.(-7.2)/[(-3.6)X(+5)] =(-7.2)/(-18) = 0.4 应该系甘~~~我在内地學咗用4年拉~~~|||||1) (-52)/[(+2)X(-13)] =(-52)/(-26) =+2 2) (-12)X[(-20)/(-4)] =(-12)X(+5) =-70 3) (+100)/[(-2)X(+5)] =(+100)/(-10) =-10 4) (-7.2)/[(-3.6)X(+5)] =(-7.2)/(-18) =+4 希望幫到你^^ 2007-09-26 18:25:28 補充：只要記得負負得正,正正得正,正負得負,同負正得正就得啦!!努力學好數學牙!!! 2007-09-26 18:28:13 補充： sor第4題漏了點,其實係+0.4以上果二位係岩既!!so sor=]|||||1.(-52)/[(+2)X(-13)] = (-52)/(-26) = 2 2.(-12)X[(-20)/(-4)] = (-12)X(5) = -60 3.(+100)/[(-2)X(+5)] =(+100)/(-10) =-10 4.(-7.2)/[(-3.6)X(+5)] =(-7.2)/(-18) = 0.4 計bracket sin.. remember 乘同除都係正負得負，負負得正