这些有里数加法的运算律 计算题怎么写?1)、(+15)+(-20)+(+28)+(-10)+(-5)+(-7) 2、(+2又3/4)+(-1又5/8)+(-5/6)+3/8+(4又2/3) 3、(-2又1/2)+(-5/6)+(-0.5)+(1又1/6) 4、(-1/2)+(-12)+8
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 07:42:28
![这些有里数加法的运算律 计算题怎么写?1)、(+15)+(-20)+(+28)+(-10)+(-5)+(-7) 2、(+2又3/4)+(-1又5/8)+(-5/6)+3/8+(4又2/3) 3、(-2又1/2)+(-5/6)+(-0.5)+(1又1/6) 4、(-1/2)+(-12)+8](/uploads/image/z/13774855-31-5.jpg?t=%E8%BF%99%E4%BA%9B%E6%9C%89%E9%87%8C%E6%95%B0%E5%8A%A0%E6%B3%95%E7%9A%84%E8%BF%90%E7%AE%97%E5%BE%8B+%E8%AE%A1%E7%AE%97%E9%A2%98%E6%80%8E%E4%B9%88%E5%86%99%3F1%EF%BC%89%E3%80%81%EF%BC%88%2B15%EF%BC%89%2B%28-20%29%2B%EF%BC%88%2B28%EF%BC%89%2B%EF%BC%88-10%EF%BC%89%2B%28-5%29%2B%28-7%29+2%E3%80%81%EF%BC%88%2B2%E5%8F%883%2F4%EF%BC%89%2B%EF%BC%88-1%E5%8F%885%2F8%EF%BC%89%2B%EF%BC%88-5%2F6%EF%BC%89%2B3%2F8%2B%EF%BC%884%E5%8F%882%2F3%EF%BC%89+3%E3%80%81%EF%BC%88-2%E5%8F%881%2F2%EF%BC%89%2B%EF%BC%88-5%2F6%EF%BC%89%2B%EF%BC%88-0.5%EF%BC%89%2B%EF%BC%881%E5%8F%881%2F6%EF%BC%89+4%E3%80%81%EF%BC%88-1%2F2%EF%BC%89%2B%EF%BC%88-12%EF%BC%89%2B8)
这些有里数加法的运算律 计算题怎么写?1)、(+15)+(-20)+(+28)+(-10)+(-5)+(-7) 2、(+2又3/4)+(-1又5/8)+(-5/6)+3/8+(4又2/3) 3、(-2又1/2)+(-5/6)+(-0.5)+(1又1/6) 4、(-1/2)+(-12)+8
这些有里数加法的运算律 计算题怎么写?
1)、(+15)+(-20)+(+28)+(-10)+(-5)+(-7) 2、(+2又3/4)+(-1又5/8)+(-5/6)+3/8+(4又2/3) 3、(-2又1/2)+(-5/6)+(-0.5)+(1又1/6) 4、(-1/2)+(-12)+8+(+0.5)+(+4) 5、(-11又1/2)+(+23又1/3)+(+21又1/2)+(-34又1/2)+(-27)
这些有里数加法的运算律 计算题怎么写?1)、(+15)+(-20)+(+28)+(-10)+(-5)+(-7) 2、(+2又3/4)+(-1又5/8)+(-5/6)+3/8+(4又2/3) 3、(-2又1/2)+(-5/6)+(-0.5)+(1又1/6) 4、(-1/2)+(-12)+8
(1)原式=15-20+28-10-5-7=-5+28-10-5-7=23-10-5-7=13-5-7=8-7=1
(2)原式=11/4-13/8-5/6+3/8+14/3=(11/4-13/8+3/8)+(14/3-5/6)=3/2+23/6=16/3
(3)原式=(-5/2-1/2)+(-5/6+7/6)=-3+1/3=-8/3
(4)原式=[-1/2+(0.5)]+(-12+8+4)=0+0=0
(5)原式=[(-11又1/2)+(+21又1/2)+(-34又1/2)]-27+23又1/3
=10-34又1/2-27+23又1/3
=10-27+(23又1/3-34又1/2)
=-17-11又1/6
=-28又1/6