亚洲男人天堂av,国产一区二区久久精品,国产精品一区二区久久精品,国产精品久久久久久一区二区三区,五月婷婷在线观看视频,亚洲狠狠色丁香婷婷综合

歡迎您訪問數學考題練習:如果a、b是兩個有理數,那么a-b的相反數一定!

數學考題練習:如果a、b是兩個有理數,那么a-b的相反數一定

更新時間:2024-01-12 14:00:42作者:貝語網校

如果a、b是兩個有理數,那么a-b的相反數一定是

A.-a-b

B.a+b

C.b-a

D.-(b-a)

試題答案

C

∵a-b的相反數為-(a-b)=b-a.

為您推薦

數學考題練習:如圖:順次連接矩形A1B1C1D1四邊的中點得

如圖:順次連接矩形A1B1C1D1四邊的中點得到四邊形A2B2C2D2,再順次連接四邊形A2B2C2D2四邊的中點得四邊形A3B3C3D3,…,按此規律得到四邊形AnBnCnDn.若矩形A1B1C1D1的面積為24,那么四邊形AnBnCnD

2024-01-12 14:01

數學考題練習:在一次同學聚會時,大家一見面就互相握手,有人統

在一次同學聚會時,大家一見面就互相握手,有人統計了一下,大家一共握了45次手,設參加聚會的同學共有x人,則根據題意列方程得A.x(x-1)=45B.x(x-1)=45C.2x(x-1)=45D.x(x+1)=45

2024-01-12 14:01

數學考題練習:下列四個命題中正確的命題個數有①三角形最多有三

下列四個命題中正確的命題個數有①三角形最多有三條對稱軸;②在△ABC中,若a2+b2≠c2,則△ABC不是直角三角形;③等腰三角形的一邊長為4,另一邊長9,則它的周長為17或22;④一個三角形中至少有兩個銳角.A.1個B.2個C.3個D.4

2024-01-12 14:01

數學考題練習:如圖所示,在△ABC中,DE∥BC分別交AB、

如圖所示,在△ABC中,DE∥BC分別交AB、AC于點D、E,AE=1,EC=2,那么AD與AB的比為A.1:2B.1:3C.1:4D.1:9

2024-01-12 14:01

數學考題練習:下列說法錯誤的是

下列說法錯誤的是A.多項式2x2-3x-1是二次三項式B.多項式的常數項是-2C.多項式2x3-4x2-7的二次項系數是-4D.多項式6x3y-7xy2是三次二項式

2024-01-12 14:01

數學考題練習:把多項式(m+1)(m-1)+(m-1)提取公

把多項式(m+1)(m-1)+(m-1)提取公因式(m-1)后,余下的部分是A.m+1B.2mC.2D.m+2

2024-01-12 14:00

加載中...
主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |