5道初一数学有理数计算题.(+7.2)-(+3.6)-(-3.6)-(-2.5)(-72)-(-37)-(-22)-170-(+3)-|-3.5|-(-4.2)1/2-(-1/2)-(-3/4)-1/62/3-1/8-(-1/3)+(-3/8)
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![5道初一数学有理数计算题.(+7.2)-(+3.6)-(-3.6)-(-2.5)(-72)-(-37)-(-22)-170-(+3)-|-3.5|-(-4.2)1/2-(-1/2)-(-3/4)-1/62/3-1/8-(-1/3)+(-3/8)](/uploads/image/z/320067-27-7.jpg?t=5%E9%81%93%E5%88%9D%E4%B8%80%E6%95%B0%E5%AD%A6%E6%9C%89%E7%90%86%E6%95%B0%E8%AE%A1%E7%AE%97%E9%A2%98.%EF%BC%88%2B7.2%EF%BC%89-%EF%BC%88%2B3.6%EF%BC%89-%EF%BC%88-3.6%EF%BC%89-%EF%BC%88-2.5%EF%BC%89%EF%BC%88-72%EF%BC%89-%EF%BC%88-37%EF%BC%89-%EF%BC%88-22%EF%BC%89-170-%EF%BC%88%2B3%EF%BC%89-%7C-3.5%7C-%EF%BC%88-4.2%EF%BC%891%2F2-%EF%BC%88-1%2F2%EF%BC%89-%EF%BC%88-3%2F4%EF%BC%89-1%2F62%2F3-1%2F8-%EF%BC%88-1%2F3%EF%BC%89%2B%EF%BC%88-3%2F8%EF%BC%89)
5道初一数学有理数计算题.(+7.2)-(+3.6)-(-3.6)-(-2.5)(-72)-(-37)-(-22)-170-(+3)-|-3.5|-(-4.2)1/2-(-1/2)-(-3/4)-1/62/3-1/8-(-1/3)+(-3/8)
5道初一数学有理数计算题.
(+7.2)-(+3.6)-(-3.6)-(-2.5)
(-72)-(-37)-(-22)-17
0-(+3)-|-3.5|-(-4.2)
1/2-(-1/2)-(-3/4)-1/6
2/3-1/8-(-1/3)+(-3/8)
5道初一数学有理数计算题.(+7.2)-(+3.6)-(-3.6)-(-2.5)(-72)-(-37)-(-22)-170-(+3)-|-3.5|-(-4.2)1/2-(-1/2)-(-3/4)-1/62/3-1/8-(-1/3)+(-3/8)
9.7
-30
-2.3
19/12
1/2
1、(+7.2)-(+3.6)-(-3.6)-(-2.5)
=7.2-3.6+3.6+2.5
=(7.2+2.5)+(-3.6+3.6)
=9.7+0
=9.7
2、(-72)-(-37)-(-22)-17
=-72+37+22-17
=(-72+22)+(37-17)
=-50+20
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1、(+7.2)-(+3.6)-(-3.6)-(-2.5)
=7.2-3.6+3.6+2.5
=(7.2+2.5)+(-3.6+3.6)
=9.7+0
=9.7
2、(-72)-(-37)-(-22)-17
=-72+37+22-17
=(-72+22)+(37-17)
=-50+20
=-30
3、0-(+3)-|-3.5|-(-4.2)
=0-3-3.5+4.2
=-3-3.5+4.2
=-6.5+4.2
=-2.3
4、1/2-(-1/2)-(-3/4)-1/6
=1/2+1/2+3/4-1/6
=1+3/4-1/6
=7/4-1/6
=21/12-2/12
=19/12
=1又7/12
5、2/3-1/8-(-1/3)+(-3/8)
=2/3-1/8+1/3-3/8
=(2/3+1/3)-(1/8+3/8)
=1-1/2
=1/2
收起
9.7
30
3.7
19/12