有理数的减法!(-5)-(-3); 0-(-7); (+25)-(-13); (-11)-(+5); 12-21; (-1,7)-(2.5); 三分之二-(-二分之一); (-六分之一)-(-三分之一); (-六又五分之四)-(-1.8); 【(-5)-(-8)】-(-4);
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![有理数的减法!(-5)-(-3); 0-(-7); (+25)-(-13); (-11)-(+5); 12-21; (-1,7)-(2.5); 三分之二-(-二分之一); (-六分之一)-(-三分之一); (-六又五分之四)-(-1.8); 【(-5)-(-8)】-(-4);](/uploads/image/z/1266001-25-1.jpg?t=%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E5%87%8F%E6%B3%95%21%28-5%29-%28-3%29%3B+0-%28-7%29%3B+%28%2B25%29-%28-13%29%3B+%28-11%29-%28%2B5%29%3B+12-21%3B+%28-1%2C7%29-%282.5%29%3B+%E4%B8%89%E5%88%86%E4%B9%8B%E4%BA%8C-%EF%BC%88-%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%89%EF%BC%9B+%EF%BC%88-%E5%85%AD%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%89-%EF%BC%88-%E4%B8%89%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%89%EF%BC%9B+%EF%BC%88-%E5%85%AD%E5%8F%88%E4%BA%94%E5%88%86%E4%B9%8B%E5%9B%9B%EF%BC%89-%EF%BC%88-1.8%EF%BC%89%EF%BC%9B+%E3%80%90%EF%BC%88-5%EF%BC%89-%EF%BC%88-8%EF%BC%89%E3%80%91-%EF%BC%88-4%EF%BC%89%EF%BC%9B)
有理数的减法!(-5)-(-3); 0-(-7); (+25)-(-13); (-11)-(+5); 12-21; (-1,7)-(2.5); 三分之二-(-二分之一); (-六分之一)-(-三分之一); (-六又五分之四)-(-1.8); 【(-5)-(-8)】-(-4);
有理数的减法!
(-5)-(-3); 0-(-7); (+25)-(-13); (-11)-(+5); 12-21; (-1,7)-(2.5); 三分之二-(-二分之一); (-六分之一)-(-三分之一); (-六又五分之四)-(-1.8); 【(-5)-(-8)】-(-4);
有理数的减法!(-5)-(-3); 0-(-7); (+25)-(-13); (-11)-(+5); 12-21; (-1,7)-(2.5); 三分之二-(-二分之一); (-六分之一)-(-三分之一); (-六又五分之四)-(-1.8); 【(-5)-(-8)】-(-4);
(-5)-(-3);
=-5+3
=-2
0-(-7)
=0+7
=7
(+25)-(-13)
=25+13
=38
(-11)-(+5)
=-11-5
=-16
12-21
=-9
(-1.7)-(2.5)
=-1.7-2.5
=-4.2
三分之二-(-二分之一)
=2/3+1/2
=7/6
(-六分之一)-(-三分之一)
=-1/6+1/3
=1/6
(-六又五分之四)-(-1.8)
=-6.8+1.8
=-5
【(-5)-(-8)】-(-4)
=【-5+8】+4
=3+4
=7
江苏吴云超解答 供参考!