0.25+(-3又8分之1)+(-4分之1)+(-5又4分之3)利用运算律
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)0-29.8-17.5+16.5-2.2+7.54又2/3+[8.6-(+...
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)
0-29.8-17.5+16.5-2.2+7.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
急急急。。。。快。。好的话分没问题 展开
0-29.8-17.5+16.5-2.2+7.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
急急急。。。。快。。好的话分没问题 展开
8个回答
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那一幕ss,你好:
0.25+(-3又1/8)+(-1/4)+(-5又3/4)
=1/4-1/4-3又1/8-5又3/4
=-8又7/8
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)
=(13又2/5+7又3/5)-(55又1/6+14又5/6)+11.702
=21-70+11.702
=-37.298
0-29.8-17.5+16.5-2.2+7.5
=-29.8-2.2-17.5+7.5+16.5
=-32-10+16.5
=-25.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
=4又2/3+8.6-3又2/3-7/5-2又3/5
=(4又2/3-3又2/3)+(8.6-2又3/5)-7/5
=1+6-7/5
=5.6
0.25+(-3又1/8)+(-1/4)+(-5又3/4)
=1/4-1/4-3又1/8-5又3/4
=-8又7/8
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)
=(13又2/5+7又3/5)-(55又1/6+14又5/6)+11.702
=21-70+11.702
=-37.298
0-29.8-17.5+16.5-2.2+7.5
=-29.8-2.2-17.5+7.5+16.5
=-32-10+16.5
=-25.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
=4又2/3+8.6-3又2/3-7/5-2又3/5
=(4又2/3-3又2/3)+(8.6-2又3/5)-7/5
=1+6-7/5
=5.6
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0.25+(-3又8分之1)+(-4分之1)+(-5又4分之3)
=1/4-3-1/8-1/4-5-3/4
=-8-1/8-6/8
=-8-7/8
=-8又8分之7
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)
=13+2/5-55-1/6+7+3/5-14-5/6+11.702
=13-55+7-14+11.702+2/5+3/5-1/6-5/6
=-37.298
0-29.8-17.5+16.5-2.2+7.5
=-29.8-2.2-17.5+7.5+16.5
=-32-10+16.5
=-25.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
=4+2/3+8.6-3-2/3-7/5-2-3/5
=4+8.6-3-2+2/3-2/3-7/5-3/5
=12.6-5-2
=5.6
=1/4-3-1/8-1/4-5-3/4
=-8-1/8-6/8
=-8-7/8
=-8又8分之7
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)
=13+2/5-55-1/6+7+3/5-14-5/6+11.702
=13-55+7-14+11.702+2/5+3/5-1/6-5/6
=-37.298
0-29.8-17.5+16.5-2.2+7.5
=-29.8-2.2-17.5+7.5+16.5
=-32-10+16.5
=-25.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
=4+2/3+8.6-3-2/3-7/5-2-3/5
=4+8.6-3-2+2/3-2/3-7/5-3/5
=12.6-5-2
=5.6
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0.25+(-3又8分之1)+(-4分之1)+(-5又4分之3)
=(0.25-1/4)-(3又1/8+5又3/4)
=0-8又7/8
=8又7/8
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)
=(13又2/5+7又3/5)-(55又1/6+14又5/6)+11.702
=21-70+11.702
=37.298
0-29.8-17.5+16.5-2.2+7.5
=(-29.8-2.2)-(17.5+7.5)+16.5
=-32-10+16.5
=-25.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
=(4又2/3-3又2/3)+(-7/5-2又3/5)+8.6
=1-4+8.6
=5.6
=(0.25-1/4)-(3又1/8+5又3/4)
=0-8又7/8
=8又7/8
(+13又2/5)-(+55又1/6)+(+7又3/5)+(-14又5/6)-(-11.702)
=(13又2/5+7又3/5)-(55又1/6+14又5/6)+11.702
=21-70+11.702
=37.298
0-29.8-17.5+16.5-2.2+7.5
=(-29.8-2.2)-(17.5+7.5)+16.5
=-32-10+16.5
=-25.5
4又2/3+[8.6-(+3又2/3)+(-7/5)]+(-2又3/5)
=(4又2/3-3又2/3)+(-7/5-2又3/5)+8.6
=1-4+8.6
=5.6
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1、0.25和-1/4相互抵消,然后-3-5=-8,-1/8 - 3/4 = -7/8 ,所以答案是-8又-7/8
2、+13又2/5 和 +7又3/5相加得+21,-(+55又1/6)和(-14又5/6)运算后得-70,21-70=-49,
最后-49-(-11.702)=-49+11.702 = -37.298
3、-29.8-2.2 = -32,-17.5+16.5=-1,最后是-32-1+7.5=-25.5
4、原式=4又2/3 + 8.6 - 3又2/3 -7/5 -2又3/5
则=4又2/3- 3又2/3得+1,-7/5 -2又3/5=-4,最后为 1-4+8.6 = 5.6
2、+13又2/5 和 +7又3/5相加得+21,-(+55又1/6)和(-14又5/6)运算后得-70,21-70=-49,
最后-49-(-11.702)=-49+11.702 = -37.298
3、-29.8-2.2 = -32,-17.5+16.5=-1,最后是-32-1+7.5=-25.5
4、原式=4又2/3 + 8.6 - 3又2/3 -7/5 -2又3/5
则=4又2/3- 3又2/3得+1,-7/5 -2又3/5=-4,最后为 1-4+8.6 = 5.6
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在计算有小数,分数,又有带分数的混合题时,要把小数和分数统一成小数或分数,把带分数化成假分数,分母不同时,要通分变成同分母,再进行合并计算。本题详解如下:
0.25-(3*8+1)/8-0.25-(5*4+3)/4=0.25-0.25-25/8-23/4.
=-25/8-23*2/8.
=-25/8-46/8.
=-(25+46)/8.
=-71/8.
0.25-(3*8+1)/8-0.25-(5*4+3)/4=0.25-0.25-25/8-23/4.
=-25/8-23*2/8.
=-25/8-46/8.
=-(25+46)/8.
=-71/8.
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