递等式计算2400÷80-14×2 108-(83+36...
递等式计算2400÷80-14×2108-(83+360÷60)(420+48)÷(375-339)420÷[(205-198)×4]460÷(29-18÷3)1450÷...
递等式计算2400÷80-14×2 108-(83+360÷60) (420+48)÷(375-339) 420÷[(205-198)×4] 460÷(29-18÷3) 1450÷[2×(16+9)].
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(1)2400÷80-14×2,
=30-28,
=2;
(2)108-(83+360÷60),
=108-(83+6),
=108-89,
=19;
(3)(420+48)÷(375-339),
=468÷36,
=13;
(4)420÷[(205-198)×4],
=420÷[7×4],
=420÷28,
=15;
(5)460÷(29-18÷3),
=460÷(29-6),
=460÷23,
=20;
(6)1450÷[2×(16+9)],
=1450÷[2×25],
=1450÷50,
=29.
=30-28,
=2;
(2)108-(83+360÷60),
=108-(83+6),
=108-89,
=19;
(3)(420+48)÷(375-339),
=468÷36,
=13;
(4)420÷[(205-198)×4],
=420÷[7×4],
=420÷28,
=15;
(5)460÷(29-18÷3),
=460÷(29-6),
=460÷23,
=20;
(6)1450÷[2×(16+9)],
=1450÷[2×25],
=1450÷50,
=29.
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