1,5,15,6,9,( )
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1,5,15,6,9,( )
1,5,15,6,9,( )
1,5,15,6,9,( )
1+4=5+10=15或1+4=5,1+14=15
6+3=9+10=19或6+3=9,天天向上~
1,5,15,6,9,( )
1,5,15,6,9,( )
(9/10+1/6)*5/32÷8/15
(1×2×3+3×6×9+5×10×15+7×14×21)/(1×3×5+3×9×15+5×15×25+7×21×35)
简便运算,4/15/(1又4/9-2/3*5/6)+1/5
计算 2/5+5/8+3/5 6/7+7/9 1-4/9-1/6 8/9-(2/15+1/3) 4/3-(1/8+3/10)2/5+5/8+3/5 6/7+7/9 1-4/9-1/6 8/9-(2/15+1/3) 4/3-(1/8+3/10)
简算15/8除以(32/5*(10/9+6/1))
找规律(1)1,2,4,8,().(2)3,5,6,10,9,15,(),().
15×5/9+5/6
15*2/5表示 5/9/1/6表示
简便运算:8/15*【5/6/(7/9-1/3)】 85-84 7/8/7
8/15乘[5/6除以(7/9-1/3)]等于多少?
90×(7/9+5/6-8/15)÷2又1/33
7 1 2 5 4 6 9 8 15 13 () 21
(1*3*5+2*6*10+3*9*15+4*12*20+5*15*25)/(1*2*3+2*4*6+3*6*9+4*8*12+5*10*15)等于多少?
5(x-9)≥15-6(x-1) 1/5x-2≤4-2/5x
3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12×3/7 × 49/9 - 4/3 8/9 × 15/36 + 1/27 12× 5/6 – 2/9 ×3 8× 5/4 + 1/4 6÷ 3/8 – 3/8 ÷6 4/7 × 5/9 + 3/7 × 5/9 5/2 -( 3/2 + 4/5 ) 7/8 + ( 1/8 + 1/9 ) 9 × 5/6 + 5/6 3/4 × 8/9 - 1/3 7 × 5/4
(1*2*3+3*6*9+7*14*21)/(1*3*5+3*9*15+7*21*35)