简便运算4-3.5-[(-2.5-1.2+4)-6.9]=?3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125=?guo cheng
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 17:30:54
![简便运算4-3.5-[(-2.5-1.2+4)-6.9]=?3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125=?guo cheng](/uploads/image/z/33542-62-2.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%974-3.5-%5B%28-2.5-1.2%2B4%29-6.9%5D%3D%3F3.75-%5B%28-8%E5%88%86%E4%B9%8B3%29%2B%28-2%E5%88%86%E4%B9%8B1%29-%28-6%E5%88%86%E4%B9%8B5%29%2B4%E5%8F%883%E5%88%86%E4%B9%8B2%5D-0.125%3D%3Fguo+cheng)
简便运算4-3.5-[(-2.5-1.2+4)-6.9]=?3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125=?guo cheng
简便运算4-3.5-[(-2.5-1.2+4)-6.9]=?3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125=?
guo cheng
简便运算4-3.5-[(-2.5-1.2+4)-6.9]=?3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125=?guo cheng
1、4-3.5-[(-2.5-1.2+4)-6.9]=4-4-3.5+2.5+1.2+6.9=7.1
2、3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125
=3+3/4+3/8+1/2-5/6-4-2/3-1/8
=(3-4)+[3/4+(3/8-1/8)]+(1/2-5/6-2/3)
=-1+1+3/6-5/6-4/6
=-6/6
=-1
4-3.5-[(-2.5-1.2+4)-6.9]=10.1
3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125=-1.1
4-3.5-[(-2.5-1.2+4)-6.9]=0.5-(0.3-6.9)=0.5-(-6.6)=7.1
3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125
=15/4-(-3/8-1/2+5/6+14/3)-1/8
=15/4+3/8+1/2-5/6-14/3-1/8
=15/4+(3/8-1/8)+1/2-(5/6+14/3)
=15/4+1/4+(1/2-11/2)
=4-5
=-1
1>
4-4-(3.5-2.5)+1.2+6.9=-1+1.2+6.9=7.1
2>
=3+3/4+3/8+1/2-5/6-4-2/3-1/8
=3-4+[(3/8-1/8)+3/4]-5/6-2/3
=-1+1-(5/6+4/6)
=-3/2
-1又2分之1
4-3.5-[(-2.5-1.2+4)-6.9]
=4-3.5+2.5+1.2-4+6.9
=(4-4)-(3.5-2.5-1.2)+6.9
=0.2+6.9
=7.1
3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125
=3.75+8分之3+2分之1-6分之5-4又3分之2-0.125
=8分之3-0.125+0.75+(3-4又3分之2)+(2分之1-6分之5)
=0.25+0.75-1又3分之2-3分之1
=-1
7.1