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1.(5又5/9-0.8+2又4/9)×(7.6÷4/5+2又2/5×1.25)2.1.1×4又21/97+40.9÷5又2/19-4.09×9/973.1/21+1/77+1/165+1/285+1/437
题目详情
1.(5又5/9-0.8+2又4/9)×(7.6÷4/5+2又2/5×1.25)
2.1.1×4又21/97+40.9÷5又2/19-4.09×9/97
3.1/21+1/77+1/165+1/285+1/437
2.1.1×4又21/97+40.9÷5又2/19-4.09×9/97
3.1/21+1/77+1/165+1/285+1/437
▼优质解答
答案和解析
1.=5又5/9+2又4/9-0.8)×(38/5×5/4+12/5+5/4)
=26/5×25/2
=65
2.=1.1×4又21/97+40.9×19/97-4.09×9/97
=11/10×409/97+409/10×19/97-409/100×9/97
=11/10×409/97+19/10×409/97-9/100×409/97
=409/97×(11/10+19/10-9/100)
=409/97×291/100
=409×3/100
=12.27
3.貌似除不尽.
=26/5×25/2
=65
2.=1.1×4又21/97+40.9×19/97-4.09×9/97
=11/10×409/97+409/10×19/97-409/100×9/97
=11/10×409/97+19/10×409/97-9/100×409/97
=409/97×(11/10+19/10-9/100)
=409/97×291/100
=409×3/100
=12.27
3.貌似除不尽.
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