1(+8）+(-10)+（-2）+(+1)2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)3(+0.65)+(-1.9)+(-0.1)+(+0.65)4(+1/2）+（-2/3)+(+4/5)+(-1/2)+(-1/3)5(-10/3)+(+15.5)+(-50/3)+(-5.5)6(+1/16)+(-3.5)+(-2.5)+(+15/16)7(+1)+(-21/2)+(-83/37)+(-9.5)8(+0.5)+(13/4)+(-2.

1(+8）+(-10)+（-2）+(+1)2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)3(+0.65)+(-1.9)+(-0.1)+(+0.65)4(+1/2）+（-2/3)+(+4/5)+(-1/2)+(-1/3)5(-10/3)+(+15.5)+(-50/3)+(-5.5)6(+1/16)+(-3.5)+(-2.5)+(+15/16)7(+1)+(-21/2)+(-83/37)+(-9.5)8(+0.5)+(13/4)+(-2.
1(+8）+(-10)+（-2）+(+1)
2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)
3(+0.65)+(-1.9)+(-0.1)+(+0.65)
4(+1/2）+（-2/3)+(+4/5)+(-1/2)+(-1/3)
5(-10/3)+(+15.5)+(-50/3)+(-5.5)
6(+1/16)+(-3.5)+(-2.5)+(+15/16)
7(+1)+(-21/2)+(-83/37)+(-9.5)
8(+0.5)+(13/4)+(-2.75)+(+11/2)

1(+8）+(-10)+（-2）+(+1)2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)3(+0.65)+(-1.9)+(-0.1)+(+0.65)4(+1/2）+（-2/3)+(+4/5)+(-1/2)+(-1/3)5(-10/3)+(+15.5)+(-50/3)+(-5.5)6(+1/16)+(-3.5)+(-2.5)+(+15/16)7(+1)+(-21/2)+(-83/37)+(-9.5)8(+0.5)+(13/4)+(-2.
楼上后面两题都做错了
1(+8）+(-10)+（-2）+(+1)
=(8+1)-(10+2)
=9-12
=-3
2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)
=(6+4+7)-(5+3+9)
=17-17
=0
3(+0.65)+(-1.9)+(-0.1)+(+0.65)
=0.65-1.9-0.1+0.65
=(0.65+0.65)-(1.9+0.1)
=1.3-2
=-0.7
4(+1/2）+（-2/3)+(+4/5)+(-1/2)+(-1/3)
=(1/2-1/2)+(4/5)-(2/3+1/3)
=0+4/5-1
=-1/5
5(-10/3)+(+15.5)+(-50/3)+(-5.5)
=(-10/3-50/3)+15.5-5.5
=-60/3+10
=-20+10
=-10
6(+1/16)+(-3.5)+(-2.5)+(+15/16)
=(1/16+15/16)-(3.5+2.5)
=1-6
=-5
7(+1)+(-21/2)+(-83/37)+(-9.5)
=1-(21/2+9.5)+(-83/37)
=1-(20)-83/37
=-19-2又9/37
=-21又9/37
8(+0.5)+(13/4)+(-2.75)+(+11/2)
=(0.5+11/2)+(13/4-2.75)
=6+0.5
=6.5

1= -2-2+1=-4+1=-3
2= 1-3-9+4+7=-2-9+4+7=-11+4+7=-7+7=0
3= 1.3-1.9-0.1=1.3-2=-0.7
4= -2/3+4/5-1/3=-1+4/5=-1/5
5= -60/3+15.5-5.5=-20+10= -10
6= （1/16+15/16）+（-3.5-2.5）=1-6=-5
7= ...

全部展开

1= -2-2+1=-4+1=-3
2= 1-3-9+4+7=-2-9+4+7=-11+4+7=-7+7=0
3= 1.3-1.9-0.1=1.3-2=-0.7
4= -2/3+4/5-1/3=-1+4/5=-1/5
5= -60/3+15.5-5.5=-20+10= -10
6= （1/16+15/16）+（-3.5-2.5）=1-6=-5
7= -83/37+1+（-10.5-9.5）=-83/37+1-20=-83/37-19=-2又9/37-19=-21又9/37
8= （0.5+11/2）+（13/4-2.75）=6+0.5=6.5
初一计算加减乘除？貌似太弱了点
老了，加减乘除都能算错。

收起

1(+8）+(-10)+（-2）+(+1)
=(8+1)-(10+2)
=9-12
=-3
2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)
=(6+4+7)-(5+3+9)
=17-17
=0
3(+0.65)+(-1.9)+(-0.1)+(+0.65)
=0.65-1.9-0.1+0.65
=(0.65...

全部展开

1(+8）+(-10)+（-2）+(+1)
=(8+1)-(10+2)
=9-12
=-3
2(-5）+（+6）+（-3）+(-9)+(+4）+（+7)
=(6+4+7)-(5+3+9)
=17-17
=0
3(+0.65)+(-1.9)+(-0.1)+(+0.65)
=0.65-1.9-0.1+0.65
=(0.65+0.65)-(1.9+0.1)
=1.3-2
=-0.7
4(+1/2）+（-2/3)+(+4/5)+(-1/2)+(-1/3)
=(1/2-1/2)+(4/5)-(2/3+1/3)
=0+4/5-1
=-1/5
5(-10/3)+(+15.5)+(-50/3)+(-5.5)
=(-10/3-50/3)+15.5-5.5
=-60/3+10
=-20+10
=-10
6(+1/16)+(-3.5)+(-2.5)+(+15/16)
=(1/16+15/16)-(3.5+2.5)
=1-6
=-5
7(+1)+(-21/2)+(-83/37)+(-9.5)
=1-(21/2+9.5)+(-83/37)
=1-(20)-83/37
=-19-2又9/37
=-21又9/37
8(+0.5)+(13/4)+(-2.75)+(+11/2)
=(0.5+11/2)+(13/4-2.75)
=6+0.5
=6.5

收起

1= -2-2+1=-4+1=-3
2= 1-3-9+4+7=-2-9+4+7=-11+4+7=-7+7=0
3= 1.3-1.9-0.1=1.3-2=-0.7
4= -2/3+4/5-1/3=-1+4/5=-1/5
5= -60/3+15.5-5.5=-20+10= -10
6= （1/16+15/16）+（-3.5-2.5）=1-6=-5
7= -83/37+1+（-10.5-9.5）=-83/37+1-21=-83/37-20=-2又9/37-20=-22又9/37
8= （0.5+11/2）+（13/4-2.75）=6+6=12