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標題:

maths!!!!!!

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發問:

1.(+6)/(-2)+(+5) 2.(+84)-(+32)x(-2) 3.(-1)+(5)(-2)-(-7) 4.(-10)+(+50)-(+49)/(-7) 5.(-4)(-2)+(-5)(-3) 6.(+8)(-2)-(-7)(+4) 7.(-15)/(-3)+(+49)/(-7) 8.(-28)/(+4)-(-3)(-6) 要寫步x!thx!

最佳解答:

1.(+6)/(-2)+(+5) =(-3)+5 =5-3 =2 2.(+84)-(+32)x(-2) =(84-32)x(-2) =52x(-2) =(-104) 3.(-1)+(5)(-2)-(-7) =5(-2)-1+7 =(-10)-1+7 =7-10-1 =(-3)-1 =(-4) 4.(-10)+(+50)-(+49)/(-7) =(-10)+50-[49/(-7)] =40-(-7) =47 5.(-4)(-2)+(-5)(-3) =8+15 =23 6.(+8)(-2)-(-7)(+4) =(-16)-(-28) =(-16)+28 =12 7.(-15)/(-3)+(+49)/(-7) =5+[49/(-7)] =5+(-7) =5-7 =(-2) 8.(-28)/(+4)-(-3)(-6) =(-7)-18 =(-25)

其他解答:

1.-3+(+5) =-3+5 =2 2.(+48)-(-16) =+48+16 =64 3.(-1)+(-10)-(-7) =-1-10+7 =-11+7 =-4 4.(-10)+(+50)-(-5又4/7) =-10+50+5又4/7 =40+5又4/7 =45又4/7 5.(-8)+(-15) =-8-15 =-23 6.(-16)-(-28) =-16+28 =-44 7.(-5)+(-5又4/7) =-5-5又4/7 =4/7 8.(-7)-(-18) =-7+18 =11|||||1. (+6)/(-2)+(+5) = -3+(+5) =2 2. (+84)-(+32)x(-2) =(+84)-(-64) =148 3. (-1)+(5)(-2)-(-7) =(-1)+(-10)-(-7) =(-11)-(-7) = -4 4. (-10)+(+50)-(+49)/(-7) =(-10)+(+50)-(-7) =(+40)-(-7) =47 5. (-4)(-2)+(-5)(-3) =8+15 =23 6. (+8)(-2)-(-7)(+4) =(-16)-(-28) =12 7. (-15)/(-3)+(+49)/(-7) =5+(-7) =-2 8. (-28)/(+4)-(-3)(-6) =(-7)-18 =-25 2007-09-26 18:25:39 補充：第二題 :先乘除後加減