正負數:
(-8)+6
(-17)+(-5)
(-28)-(+23)
(-20)-(-11)
(+18)*(-3)
(-22)*(+4)
(-32)*(-6)
〔-2/3〕(+9)÷(-6)
〔-5/7〕(-7)÷5
(+3)(-11)(-20)/(+5)(-33)
正負數:(10題)
2007-08-31 8:38 pm
回答 (3)
2007-08-31 8:48 pm
✔ 最佳答案
(-8)+6 = -2(-17)+(-5) = -22
(-28)-(+23) = -51
(-20)-(-11) = -9
(+18)*(-3) = -54
(-22)*(+4) = -88
(-32)*(-6) = 192
〔-2/3〕(+9)÷(-6) = 1
〔-5/7〕(-7)÷5 = 1
(+3)(-11)(-20)/(+5)(-33) = 4
心法***負負得正, 正正得正, 負正得負***
***先乖除, 後加減
p.s. 你呢10題都係好簡單, 慢慢想想吧!
2007-08-31 8:50 pm
(-8)+6=-2
(-17)+(-5)=-22
(-28)-(+23)=-51
(-20)-(-11)=-9
(+18)*(-3)=-54
(-22)*(+4)=-88
(-32)*(-6)=192
〔-2/3〕(+9)÷(-6)=1
〔-5/7〕(-7)÷5=1
(+3)(-11)(-20)/(+5)(-33)=-4
(-17)+(-5)=-22
(-28)-(+23)=-51
(-20)-(-11)=-9
(+18)*(-3)=-54
(-22)*(+4)=-88
(-32)*(-6)=192
〔-2/3〕(+9)÷(-6)=1
〔-5/7〕(-7)÷5=1
(+3)(-11)(-20)/(+5)(-33)=-4
參考: ME
2007-08-31 8:50 pm
(-8)+6= -8+6 = -2
(-17)+(-5)= -17-5= -22
(-28)-(+23)= -28-23 =-51
(-20)-(-11)= -20+11 = -9
(+18)*(-3)= -54
(-22)*(+4)= -88
(-32)*(-6)= +192 (負負得正)
〔-2/3〕(+9)÷(-6)= (-2/3)(9)(-1/6)= (-6)(-1/6)=1 (負負得正)
〔-5/7〕(-7)÷5= (-5/7)(-7)(1/5)= 5*(1/5)= 1
(+3)(-11)(-20)/(+5)(-33)= (660)/(-165)= -4
(-17)+(-5)= -17-5= -22
(-28)-(+23)= -28-23 =-51
(-20)-(-11)= -20+11 = -9
(+18)*(-3)= -54
(-22)*(+4)= -88
(-32)*(-6)= +192 (負負得正)
〔-2/3〕(+9)÷(-6)= (-2/3)(9)(-1/6)= (-6)(-1/6)=1 (負負得正)
〔-5/7〕(-7)÷5= (-5/7)(-7)(1/5)= 5*(1/5)= 1
(+3)(-11)(-20)/(+5)(-33)= (660)/(-165)= -4
參考: 自己
收錄日期: 2021-04-25 12:52:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070831000051KK01888