UC知道初一上学期的一些计算题,帮个忙哦
来源：百度知道 编辑：UC知道 时间：2024/05/12 07:12:26
因为我6年级才毕业,做作业要的,不会..要算式写出来阿.不要只有答案的.谢谢!!
(1) 1-1/2+1/4-1/8;
(2)-8+4÷(-2);
(3)(-7)X(-5)-90÷(-15);
(4)4-5X(-1/2)^3;
(5)-2^3÷4/9X(-2/3);
(6)-5/2+28/5÷(-2)X(-5/14);
(7)-2+(1-0.2÷3/5)X(-3);
先给20分,做好在追加分.
(1) 1-1/2+1/4-1/8;
(2)-8+4÷(-2);
(3)(-7)X(-5)-90÷(-15);
(4)4-5X(-1/2)^3;
(5)-2^3÷4/9X(-2/3);
(6)-5/2+28/5÷(-2)X(-5/14);
(7)-2+(1-0.2÷3/5)X(-3);
先给20分,做好在追加分.
(1) 1-1/2+1/4-1/8
=1/2+1/4-1/8
=3/4-1/8
=5/8;
(2)-8+4÷(-2)
=-8+(-2)
=-10;
(3)(-7)X(-5)-90÷(-15)
=35-(-6)
=41;
(4)4-5X(-1/2)^3
=4-5*(-1/8)
=4-(-5/8)
=37/8;
(5)-2^3÷4/9X(-2/3)
=-8÷4/9X(-2/3)
=-18*(-2/3)
=12;
(6)-5/2+28/5÷(-2)X(-5/14)
=-5/2+(-56/5)*(-5/14)
=-5/2+4
=3/2;
(7)-2+(1-0.2÷3/5)X(-3)
=-2+(1-1/5÷3/5)X(-3)
=-2+(1-1/3)*(-3)
=-2+2/3*(-3)
=-2-2
=-4
(1)=1-0.5+0.25-0.125=0.625
(2)=-8-2=-10
(3)=35+6=41
(4)=4-5*(-0.125)=4+0.625=4.625
(5)=-8÷2/3=-12
（6）=-2.5-2.8X(-5/14)=-2.5+1=-1.5
（7）=-2+（1-1/3）X(-3)=-2-2=-4
简单的，就是打字打的累死
这个要靠自己了啊,别偷懒~