答案25
xy=-10
yz=-35
簡(jiǎn)單正負(fù)數(shù)
簡(jiǎn)單正負(fù)數(shù)
如果x= +2 ,y= -5 and z= +7.
a) xy - yz
b)[-2/3](+9)÷(-6)
c)(+3)(-11)(-20)
--------------
(+5)(-33)
如果x= +2 ,y= -5 and z= +7.
a) xy - yz
b)[-2/3](+9)÷(-6)
c)(+3)(-11)(-20)
--------------
(+5)(-33)
數(shù)學(xué)人氣：763 ℃時(shí)間：2020-05-21 13:26:02
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