有理数的减法题1.[(-4)-(+7)]-(-5)2.3-[(-3)-(+12)]3.数轴上a与b两点表示的有理数分别是负六右二分之一和七右四分之三,求两点间的距离
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![有理数的减法题1.[(-4)-(+7)]-(-5)2.3-[(-3)-(+12)]3.数轴上a与b两点表示的有理数分别是负六右二分之一和七右四分之三,求两点间的距离](/uploads/image/z/3014111-47-1.jpg?t=%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E5%87%8F%E6%B3%95%E9%A2%981.%5B%28-4%29-%28%2B7%29%5D-%28-5%292.3-%5B%28-3%29-%28%2B12%29%5D3.%E6%95%B0%E8%BD%B4%E4%B8%8Aa%E4%B8%8Eb%E4%B8%A4%E7%82%B9%E8%A1%A8%E7%A4%BA%E7%9A%84%E6%9C%89%E7%90%86%E6%95%B0%E5%88%86%E5%88%AB%E6%98%AF%E8%B4%9F%E5%85%AD%E5%8F%B3%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%E5%92%8C%E4%B8%83%E5%8F%B3%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%89%2C%E6%B1%82%E4%B8%A4%E7%82%B9%E9%97%B4%E7%9A%84%E8%B7%9D%E7%A6%BB)
有理数的减法题1.[(-4)-(+7)]-(-5)2.3-[(-3)-(+12)]3.数轴上a与b两点表示的有理数分别是负六右二分之一和七右四分之三,求两点间的距离
有理数的减法题
1.[(-4)-(+7)]-(-5)
2.3-[(-3)-(+12)]
3.数轴上a与b两点表示的有理数分别是负六右二分之一和七右四分之三,求两点间的距离
有理数的减法题1.[(-4)-(+7)]-(-5)2.3-[(-3)-(+12)]3.数轴上a与b两点表示的有理数分别是负六右二分之一和七右四分之三,求两点间的距离
[(-4)-(+7)]-(-5)
=(-4-7)+5
=-11+5
=-6
2. 3-[(-3)-(+12)]
=3-(-3-12)
=3-(-15)
=3+15
=18
3. 数轴上a与b两点表示的有理数分别是负六右二分之一和七右四分之三,求两点间的距离
(7+3/4)-[-(6+1/2)]
=7+3/4+6+1/2
=13+3/4+2/4
=13+5/4
=14+1/4
两点间的距离:14又4分之1
[(-4)-(+7)]-(-5) =-4-7+5 =-6 3-[(-3)-(+12)] =3+3+12 =18 31/4-(-13/2)=57/4 望采纳。