有理数的加减法(求下列试题的计算过程)①1-【-1-(-3/7)-5-(-4/7)】+|-6|②12又¼+(-0.75)-(4又½)-(+3.25)+(+7¾)

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有理数的加减法(求下列试题的计算过程)①1-【-1-(-3/7)-5-(-4/7)】+|-6|②12又¼+(-0.75)-(4又½)-(+3.25)+(+7¾)
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有理数的加减法(求下列试题的计算过程)①1-【-1-(-3/7)-5-(-4/7)】+|-6|②12又¼+(-0.75)-(4又½)-(+3.25)+(+7¾)
有理数的加减法(求下列试题的计算过程)
①1-【-1-(-3/7)-5-(-4/7)】+|-6|
②12又¼+(-0.75)-(4又½)-(+3.25)+(+7¾)

有理数的加减法(求下列试题的计算过程)①1-【-1-(-3/7)-5-(-4/7)】+|-6|②12又¼+(-0.75)-(4又½)-(+3.25)+(+7¾)
①1-【-1-(-3/7)-5-(-4/7)】+|-6|
=1-(-1+3/7-5+4/7)+6
=1—(-5)+6
=1+5+6
=12
②12又¼+(-0.75)-(4又½)-(+3.25)+(+7¾)
=(12又¼+7¾) +(-0.75)-(4又½)-(+3.25)
=20-0.75-3.25-4又½
=16-4又½
=11又½

①1-【-1-(-3/7)-5-(-4/7)】+|-6|
=1+1-3/7+5-4/7+6
=12
②12又¼+(-0.75)-(4又½)-(+3.25)+(+7¾)
=12又1/4-3/4-4又1/2-3又1/4+7又3/4
=16-4又1/2
=11又1/2