请问下面的五道四则运算题怎么做,A.1又3/25+[(1.5+2又2/3)÷3又3/4-0.4]+8又8/9 B.[(15/28-11/36)×21/29+6又2/7÷16/21]÷16又1/2C.1-[(2又1/2-1又1/3)÷1又1/6]÷4又1/2+2又1/3D.[1÷(3.1-3.09)]÷(1/3+0.8+8/15)E.1998×1999-1995×2002
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![请问下面的五道四则运算题怎么做,A.1又3/25+[(1.5+2又2/3)÷3又3/4-0.4]+8又8/9 B.[(15/28-11/36)×21/29+6又2/7÷16/21]÷16又1/2C.1-[(2又1/2-1又1/3)÷1又1/6]÷4又1/2+2又1/3D.[1÷(3.1-3.09)]÷(1/3+0.8+8/15)E.1998×1999-1995×2002](/uploads/image/z/13894569-9-9.jpg?t=%E8%AF%B7%E9%97%AE%E4%B8%8B%E9%9D%A2%E7%9A%84%E4%BA%94%E9%81%93%E5%9B%9B%E5%88%99%E8%BF%90%E7%AE%97%E9%A2%98%E6%80%8E%E4%B9%88%E5%81%9A%2CA.1%E5%8F%883%2F25%2B%5B%281.5%2B2%E5%8F%882%2F3%29%C3%B73%E5%8F%883%2F4-0.4%5D%2B8%E5%8F%888%2F9+B.%5B%2815%2F28-11%2F36%29%C3%9721%2F29%2B6%E5%8F%882%2F7%C3%B716%2F21%5D%C3%B716%E5%8F%881%2F2C.1-%5B%282%E5%8F%881%2F2-1%E5%8F%881%2F3%29%C3%B71%E5%8F%881%2F6%5D%C3%B74%E5%8F%881%2F2%2B2%E5%8F%881%2F3D.%5B1%C3%B7%283.1-3.09%29%5D%C3%B7%281%2F3%2B0.8%2B8%2F15%29E.1998%C3%971999-1995%C3%972002)
请问下面的五道四则运算题怎么做,A.1又3/25+[(1.5+2又2/3)÷3又3/4-0.4]+8又8/9 B.[(15/28-11/36)×21/29+6又2/7÷16/21]÷16又1/2C.1-[(2又1/2-1又1/3)÷1又1/6]÷4又1/2+2又1/3D.[1÷(3.1-3.09)]÷(1/3+0.8+8/15)E.1998×1999-1995×2002
请问下面的五道四则运算题怎么做,
A.1又3/25+[(1.5+2又2/3)÷3又3/4-0.4]+8又8/9
B.[(15/28-11/36)×21/29+6又2/7÷16/21]÷16又1/2
C.1-[(2又1/2-1又1/3)÷1又1/6]÷4又1/2+2又1/3
D.[1÷(3.1-3.09)]÷(1/3+0.8+8/15)
E.1998×1999-1995×2002
请问下面的五道四则运算题怎么做,A.1又3/25+[(1.5+2又2/3)÷3又3/4-0.4]+8又8/9 B.[(15/28-11/36)×21/29+6又2/7÷16/21]÷16又1/2C.1-[(2又1/2-1又1/3)÷1又1/6]÷4又1/2+2又1/3D.[1÷(3.1-3.09)]÷(1/3+0.8+8/15)E.1998×1999-1995×2002
A.1又3/25+[(1.5+2又2/3)÷3又3/4-0.4]+8又8/9
=28/25+[(9/6+16/6)÷15/4-0.4]+80/9
=28/25+[(9/6+16/6)÷15/4-0.4]+80/9
=28/25+[10/9-10/25]+80/9
=10+18/25
=10又18/25
B.[(15/28-11/36)×21/29+6又2/7÷16/21]÷16又1/2
=[45/(4×29)-77/(12×29)+(44×21)/(7×16)]÷33/2
=[1/6+33/4]÷33/2
=1/99+1/2
=101/198
C.1-[(2又1/2-1又1/3)÷1又1/6]÷4又1/2+2又1/3
=1-[7/6÷7/6]÷9/2+7/3
=1-2/9+21/9
=1+19/9
=3又1/9
D.[1÷(3.1-3.09)]÷(1/3+0.8+8/15)
=100÷5/3
=60
E.1998×1999-1995×2002
=1998×1999-(1998-3)×(1999+3)
=1998×1999-(1998×1999-3×1999+1998×3-9)
=1998×1999-(1998×1999-12)
=12