75%,12.5%,66.7% ,100%,40%,300%
4/3,8/1,3/1,1,5/2,7/21
1个回答
相关问题
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找规律 2,4,7,11,( ),( ). 1,1,2,3,5,8,( ),21. 3,9,7,3,1,( ),( ).
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8/7÷4/21= 3/25*5/9= 2/3-1/2= 24*(7/12+1/8)=
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1+3+5+7+9+.+51=( ) 1+2+3+4+.+21=( ) 2+4+6+8+.+100=( )
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问:(1)3,7,15,27,43……(2)21/2,21/4,1/8,-79/16……(3)3,5,8,12,17,2
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(3/5-3/4*5/3)/1/5,8/7*(21/8-7/4)/2/3,能简算要简算
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2/1+3/1+4/3+5/2+7/5+8/7+20/9+21/10+24/11+35/19=
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(1)1-2+3-4+5-6+.-100+101= (2)1+2-3-4+5+6-7-8+.+21+22-23-24=
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(-3/5)+(-2/5)=?(+1/5)+(-4/5)=?(-3/8)-1/2=?1/6-(-2/3 )=?(+21/
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计算. (1)[2/5]×[3/7]×[21/4] (2)[3/8]×[
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3+4/7-1 8/21=