oob73zj92b的部落格

標題:

please help me (f.1)

發問:

i don't how to do? a) (+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9)= b) (-15)(-16)(+12) / (+10)(-19)(+14) =

• 2003-CE paper2
• 想知09年整體運程，特別是愛情
• 17號巴士路線

• 2003-CE paper2
• 想知09年整體運程，特別是愛情
• 17號巴士路線

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最佳解答:

首先"正正得正, 負負得正, 正負得負, 負正得負" (a) (+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9) =[(+5)(-2)][(-3)(+6)][(-4.2)(-7.3)][(-1.1)(-10.9)] =(-10)(-18)(30.66)(11.99) =(180)(367.6134) =66170.412 (b) (-15)(-16)(+12) / (+10)(-19)(+14) {先約簡) =(-3)(-16)(12) / (2)(-19)(14) =(-3)(-8)(12) / (2)(-19)(7) =288 / -266 =-144 / 133 希望幫到你^^

其他解答:

a) (+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9) [(+5)(-2)] [(-3)(+6)] [(-4.2)(-7.3)] [(-1.1)(-10.9)] 兩個兩個黎冇咁亂 =[(-10)(-18)] [(30.66)(11.99)] =(180)(367.6134) =66170.412 b) (-15)(-16)(+12)/(+10)(-19)(+14) =+144/-133 =-144/133|||||a) (+5)(-2)(-3)(+6)(-4.2)(-7.3)(-1.1)(-10.9)= +(5 * 2 * 3 * 6 * 4.2 * 7.3 * 1.1 * 10.9)= =66170.412 b) (-15)(-16)(+12) / (+10)(-19)(+14) = =+(15 * 16 * 12) / -(10 * 19 * 14) = - (2880/2660) = - 144/133