6道计算题1.(1/2-1)(1/3-1)(1/4-1)(1/5-1)(1/6-1) 2.(-2)+(-5)-(-3) 3.-0.65+(-1.9)-(+1.1)-(-13/20) 4.15x+4y-10y-7x5.2(3a+b)-(3a-b)-3(a-2b) 6.-5+6÷(-2)×1/3
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6道计算题1.(1/2-1)(1/3-1)(1/4-1)(1/5-1)(1/6-1) 2.(-2)+(-5)-(-3) 3.-0.65+(-1.9)-(+1.1)-(-13/20) 4.15x+4y-10y-7x5.2(3a+b)-(3a-b)-3(a-2b) 6.-5+6÷(-2)×1/3
6道计算题
1.(1/2-1)(1/3-1)(1/4-1)(1/5-1)(1/6-1) 2.(-2)+(-5)-(-3)
3.-0.65+(-1.9)-(+1.1)-(-13/20) 4.15x+4y-10y-7x
5.2(3a+b)-(3a-b)-3(a-2b) 6.-5+6÷(-2)×1/3
6道计算题1.(1/2-1)(1/3-1)(1/4-1)(1/5-1)(1/6-1) 2.(-2)+(-5)-(-3) 3.-0.65+(-1.9)-(+1.1)-(-13/20) 4.15x+4y-10y-7x5.2(3a+b)-(3a-b)-3(a-2b) 6.-5+6÷(-2)×1/3
1.(1/2-1)(1/3-1)(1/4-1)(1/5-1)(1/6-1)
=-(1/2)*(2/3)*(3/4)*(4/5)*(5/6)
=-1/6;
2.(-2)+(-5)-(-3)
=-2-5+3
=-4;
3.-0.65+(-1.9)-(+1.1)-(-13/20)
= -0.65-1.9-1.1+0.65
=-3;
4.15x+4y-10y-7x
=(15-7)x+(4-10)y
=8x-6y;
5.2(3a+b)-(3a-b)-3(a-2b)
=6a+2b-3a+b-3a+6b
=(6-3-3)a+(2+1+6)b
=9b;
6.-5+6÷(-2)×1/3
=-5-3*(1/3)
=-5-1
=-6.
1. YS=-1/6
2. YS=-4
3. YS=-3
4. YS=8x-6y
5. YS=9b
6. YS=-6
1.（-1/2）（-2/3）（-3/4）（-4/5）（-5/6）
=-（1/2*2/3*3/4*4/5*5/6）
=-1/6
3.-0.65-1.9-1.1+0.65=-3
5.6a+2b-3a+b-3a-6b=-3b
2.-2-5+3=-4
4.-6y+8x=8x-6y
6.-5-3*1/3=-6