1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4) 1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4)

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/27 15:14:22
1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4) 1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4)

1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4) 1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4)
1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4)
1.(-72)-(-37)-22-17
2.(+17)-(-32)+(-16)-(+24)+(-1)
3.-0.6-0.8+0.4-(-0.6)+(+0.4)

1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4) 1.(-72)-(-37)-22-17 2.(+17)-(-32)+(-16)-(+24)+(-1) 3.-0.6-0.8+0.4-(-0.6)+(+0.4)
你变符号是不是不太会?
(-72)-(-37)-22-17
=-72+37-22-17
=-35-22-17
=-57-17
=-74
(+17)-(-32)+(-16)-(+24)+(-1)
=17+32-16-24-1
=49-16-24-1
=8
-0.6-0.8+0.4-(-0.6)+(+0.4)
=-1.4+0.4+0.6+0.4
=-1+0.6+0.4
=2
这题主要是考察了对变符号的掌握程度
你们数学书上应该有这句话“同号为正(即+号)异号为负(即-号)
比如说 -(+2) 属于异号,应该为-,然后你把数字2跟到后面就是-2
明白了么?

(-72)-(-37)-22-17
=-72+37-22-17
=-35-22-17
=-57-17
=-74
(+17)-(-32)+(-16)-(+24)+(-1)
=17+32-16-24-1
=49-16-24-1
=8
-0.6-0.8+0.4-(-0.6)+(+0.4)
=-1.4+0.4+0.6+0.4
=-1+0.6+0.4
=2