4、7、10、9、5,怎么算24点
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用五个数算24?
(4+9-5)×(10-7)
=8×3
=24;
(7+9-4)×(10÷5)
=12×2
=24;
(7+5)×10÷(9-4)
=12×10÷5
=120÷5
=24;
(9-7)×5+10+4
=2×5+10+4
=10+10+4
=24;
(9+5)÷7×10+4
=14÷7×10+4
=2×10+4
=20+4
=24;
(7-4)×(10-5)+9
=3×5+9
=15+9
=24;
4×7-(9+5-10)
=28-4
=24;
(5+9-10)×7-4
=4×7-4
=28-4
=24;
(7-5)×9+(10-4)
=2×9+6
=18+6
=24;
4×10÷5+7+9
=8+7+9
=24
(4+9-5)×(10-7)
=8×3
=24;
(7+9-4)×(10÷5)
=12×2
=24;
(7+5)×10÷(9-4)
=12×10÷5
=120÷5
=24;
(9-7)×5+10+4
=2×5+10+4
=10+10+4
=24;
(9+5)÷7×10+4
=14÷7×10+4
=2×10+4
=20+4
=24;
(7-4)×(10-5)+9
=3×5+9
=15+9
=24;
4×7-(9+5-10)
=28-4
=24;
(5+9-10)×7-4
=4×7-4
=28-4
=24;
(7-5)×9+(10-4)
=2×9+6
=18+6
=24;
4×10÷5+7+9
=8+7+9
=24
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