close
這幾題數學如何做? 急
1.20+(-5)=2.8+(-13)=3.(-9)+12=4.(-31)+22=5.(-5)+(-7)=6.(-121)+120=---------------------------------------------------------------------------------------------------1.15-21=15+()=2.40-(-40)=40+()=3.(-18)-22=(-18)+()=4.(-41)-(-21)=(-41)+()=5....顯示更多1.20+(-5)=2.8+(-13)=3.(-9)+12=4.(-31)+22=5.(-5)+(-7)=6.(-121)+120=---------------------------------------------------------------------------------------------------1.15-21=15+()=2.40-(-40)=40+()=3.(-18)-22=(-18)+()=4.(-41)-(-21)=(-41)+()=5.(-12)-(-32)=(-12)+()=6.(-9)-2=(-9)+()=-----------------------------------------------------------------------------------------------------1.35-20+(-100)=2.(-40)+50+400=3.26+(-4)+(-22)=4.(-9)-2+|-43|=5.[36+(-8)]-(-24)=6.(-119)+50+=7.[37-(-29)]+[33-(-51)]=8.-2019-(3712-2019)=--------------------------------------------------------------------------------------------------------------------數線上有A丶B丶C三點，若B點為A(-3)丶C(-5)兩點的中點，求：(1)A到C的長度是多少？(2)B點的座標為何？--------------------------------------------------------------------------------------------------------------------(1)如果|甲數|=8，乙數=-5，則甲數-乙數=__________。--------------------------------------------------------------------------------------------------------------------以上幫我想一夏~謝謝^^10點急更新:6.(-119)+50+=算式有誤?這題打錯了~是6.(-119)+50+19=
(1) 20 + ( - 5 ) = 20 - 5 = 15 (2) 8 + ( - 13 ) = 8 - 13 = - 5 (3) ( - 9 ) + 12 = 12 - 9 = 3 (4) ( - 31 ) + 22 = 22 - 31 = -9 (5) ( - 5 ) + ( - 7 ) = - 5 - 7 = - 12 (6) ( - 121 ) + 120 = 120 - 121 = -1 .................................................... (1) 15 - 21 = 15 + ( - 21 ) = - 6 (2) 40 - ( - 40 ) = 40 + ( 40 ) = 80 (3) ( - 18 ) - 22 = ( - 18 ) + ( -22 ) = - 40 (4) ( - 41 ) - ( - 21 ) = ( -41 ) + ( 21 ) = -20 (5) ( - 12 ) - ( - 32 ) = ( - 12 ) + ( 32 ) = 20 (6) ( - 9 ) - 2 = ( - 9 ) + ( - 2 ) = -11 ............................................................ (1) 35 - 20 + ( - 100 ) = 35 - 20 - 100 = - 85 (2) ( - 40 ) + 50 + 400 = - 40 + 50 + 400 = 410 (3) 26 + ( - 4 ) + ( - 22 ) = 26 - 4 - 22 = 0 (4) ( - 9 ) - 2 + | - 43 | = - 9 - 2 + 43 = 32 (5) [ 36 + ( - 8 ) ] - ( - 24 ) = 36 - 8 + 24 = 52 (6) ( - 119 ) + 50 = 50 - 119 = - 69 (7) [ 37 - ( - 29 ) ] + [ 33 - ( - 51 ) ] = 37 + 29 + 33 + 51 = 150 (8) - 2019 - ( 3712 - 2019 ) = - 2019 - 3712 + 2019 = - 3712 ............................................................................................ 數線上有A丶B丶C三點，若B點為A(-3)丶C(-5)兩點的中點，求： (1) A到C的長度是多少？ | ( - 3 ) + ( - 5 ) | = 8 (2) B點的座標為何？ ( - 3 ) + ( - 5 ) = - 8 - 8 / 2 = - 4 A : (1) 8 (2) -4 ............................................................................................ 如果 | 甲數 | = 8，乙數 = -5 ，則甲數 - 乙數=__________。 case 1 甲 = 8 甲 - 乙 = 8 - ( - 5 ) = 13 case 2 甲 = - 8 甲 - 乙 = - 8 - ( - 5 ) = - 3 A : 13 or -3 2013-09-22 14:46:46 補充： 修改!!!!! 數線上有A丶B丶C三點，若B點為A(-3)丶C(-5)兩點的中點，求： (1) A到C的長度是多少？ | ( - 3 ) - ( - 5 ) | = 2 (2) B點的座標為何？ ( - 3 ) + ( - 5 ) = - 8 - 8 / 2 = - 4 A : (1) 2 (2) -4
※整數的加法：1.152.-53.34.-95.-126.-1※整數的減法：1.-21,-62.40,803.-22,-404.21,-205.32,206.-2,-11※整數的加減綜合運算：1.-852.4103.04.325.526.「(-119)+50+=」怎麼會有「+=」？你是不是打錯了呢？7.1508.-3712※求中點座標：(1)(-3)-(-5)=(-3)+5=2(2)2÷2=1-3-1=(-3)+(-1)=-4※關於絕對值：由題可得知，甲數=8或-88-(-5)=8+5=13(-8)-(-5)=(-8)+5=-3答：13或-32013-09-2222:59:33補充：6.-50參考資料：自己,自己自己要努力啊,不然可能一輩子都要靠別人.功課要自己想才會~~1.20+(-5)=152.8+(-13)=-53.(-9)+12=34.(-31)+22=-95.(-5)+(-7)=-126.(-121)+120=-1---------------------------------------------------------------------------------------------------1.15-21=15+(-21)=-62.40-(-40)=40+(40)=803.(-18)-22=(-18)+(-22)=-404.(-41)-(-21)=(-41)+(21)=-205.(-12)-(-32)=(-12)+(32)=206.(-9)-2=(-9)+(-2)=-11-----------------------------------------------------------------------------------------------------1.35-20+(-100)=-852.(-40)+50+400=4103.26+(-4)+(-22)=04.(-9)-2+|-43|=325.[36+(-8)]-(-24)=526.(-119)+50+=算式有誤?7.[37-(-29)]+[33-(-51)]=848.-2019-(3712-2019)=-3712--------------------------------------------------------------------------------------------------------------------數線上有A丶B丶C三點，若B點為A(-3)丶C(-5)兩點的中點，求：(1)A到C的長度是多少？2(2)B點的座標為何？-4--------------------------------------------------------------------------------------------------------------------(1)如果|甲數|=8，乙數=-5，則甲數-乙數=____13or-3______。參考資料：我
以上文章來自奇摩知識家，如有侵犯請留言告知
https://tw.answers.yahoo.com/question/index?qid=20130922000016KK00857