问题
解答题
递等式计算.
2400÷80-14×2
(720÷8+21)×3
400÷[300-(260-160)].
答案
(1)2400÷80-14×2
=30-28
=2;
(2)(720÷8+21)×3
=(90+21)×3
=111×3
=333;
(3)400÷[300-(260-160)]
=400÷[300-100]
=400÷200
=2.
递等式计算.
2400÷80-14×2
(720÷8+21)×3
400÷[300-(260-160)].
(1)2400÷80-14×2
=30-28
=2;
(2)(720÷8+21)×3
=(90+21)×3
=111×3
=333;
(3)400÷[300-(260-160)]
=400÷[300-100]
=400÷200
=2.