3/5+6/7+5/6+7/12+9/20+11/30+13/42=小学奥数,
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3/5+6/7+5/6+7/12+9/20+11/30+13/42=小学奥数,
3/5+6/7+5/6+7/12+9/20+11/30+13/42=小学奥数,
3/5+6/7+5/6+7/12+9/20+11/30+13/42=小学奥数,
3/5+6/7+5/6+7/12+9/20+11/30+13/42
=3/5+6/7+5/6+1/3+1/4+1/4+1/5+1/5+1/6+1/6+1/7
=(3/5+1/5+1/5)+(6/7+1/7)+(5/6+1/6+1/6+1/3)+(1/4+1/4)
=1+1+1+1/2+1/2
=3+1
=4
18471/20=923.55
(1/2-3-5/9+5/6-7/12)*(-36)
急*2**7******12**7*5*5***3*9***9*4**8*3**5*6**1*7**8*2***8*7***6*9*6**41******3**5*
6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
1+2+3+4+5+6+7+8+9+12
2 3 4 5 6 7 8 9 12 快,
{3,6,9,12}∪{2,5,7}
(3/4+5/6)×12 7/9×5/7+7/9×2/5 15/17×18 3/7-6/13×3/7
2,3,6,3,5,12,5,7,24,7,( ),( )
24乘5/6,3/5除以7/8,5/12乘4/25,7/12除以7/9,一除以11/12,2/3乘以6/5
简算 12+2×3+3×4+4×5+5×6+6×7+7×8+8×9+9×1012+2×3+3×4+4×5+5×6+6×7+7×8+8×9+9×10简算
谁能算24点?(4 11 8 9) (2 13 1 10 )(7 13 4 5)(5 11 12 6)(7 7 7 7)(9 9 9 9 )6 6 6 6 等于26 6 6 6 等于 37 7 7 7 等于137 7 7 7 等于159 9 9 9 等于11 1 2 3
3/2+7/3+7/4 9又5/4-2又7/2-1又7/5 10/4+12/5+10/6 12/5+6/1+12/7+6/5 等于多少?用简便的计算
2/3×6×3/8,3/10×4/7×7/9,4/5×4/7×5/12,等于多少?
(1/2-5/9+5/6-7/12)*(-36)=?
5/6+59+25+1/6+3/7+2/9+4/7+11/15+12/15+11/14+2/5+3/8+5/9+2/7
巧算二十四点 比如6 6 6 6就是6+6+6+61 2 13 11 2 5 10 12 4 5 6 7 4 8 11 12 4 12 1 18 1 2 3 4 13 6 12 12 6 9 13 5 1 2 7 7 1 3 4 8 3 8 9 12 2 7 9 13 8 9 11 13 3 5 6 7 5 7 10 11 7 8 9 12 2 4 11 13 3 6 7 8 1 3 10 12 2 5 9 13 3 7 10 13 1 5 9 11 6
5×6×7×8×9分之5×6×7×8×9-1×2×3×4×5
1/3,3/6,( ),5/9,7/12,( )