七年级有理数计算题
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七年级有理数计算题
七年级有理数计算题
七年级有理数计算题
(-11.28)+(-3又5/11)+(+7.28)-(+4又6/11)
=-11-0.28-3-5/11+7+0.28-4-6/11
=-11+7-3-4+0.28-0.28-6/11-5/11
=-11+0-1
=-12
(2)-2又3/4+8又7/8-3又3/4-5又5/8
=-2-3/4+8+7/8-3-3/4-5-5/8
=-2+8-5-3-3/4-3/4+7/8-5/8
=-2-6/4+2/8
=-2-1-1/2+1/4
=-3-1/4
=-3又1/4
(3)2/3-1/8-(-1/3)+(-3/8)
=2/3-1/8+1/3-3/8
=2/3+1/3-3/8-1/8
=1-1/2
=1/2
-5+(-5)=?
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(-11.28)+(-3又5/11)+(+7.28)-(+4又6/11)
=-11-0.28-3-5/11+7+0.28-4-6/11
=-11+7-3-4+0.28-0.28-6/11-5/11
=-11+0-1
=-12
(2)-2又3/4+8又7/8-3又3/4-5又5/8
=-2-3/4+8+7/8-3-3/4-5-5/8
=-2+...
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(-11.28)+(-3又5/11)+(+7.28)-(+4又6/11)
=-11-0.28-3-5/11+7+0.28-4-6/11
=-11+7-3-4+0.28-0.28-6/11-5/11
=-11+0-1
=-12
(2)-2又3/4+8又7/8-3又3/4-5又5/8
=-2-3/4+8+7/8-3-3/4-5-5/8
=-2+8-5-3-3/4-3/4+7/8-5/8
=-2-6/4+2/8
=-2-1-1/2+1/4
=-3-1/4
=-3又1/4
(3)2/3-1/8-(-1/3)+(-3/8)
=2/3-1/8+1/3-3/8
=2/3+1/3-3/8-1/8
=1-1/2
=1/2
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