问题
解答题
脱式计算.
350÷7+24×3
(720÷8+21)×3
180×[1680÷(12+4)].
答案
(1)350÷7+24×3
=50+72
=122;
(2)(720÷8+21)×3
=(90+21)×3
=111×3
=333;
(3)180×[1680÷(12+4)]
=180×[1680÷16]
=180×105
=18900.
脱式计算.
350÷7+24×3
(720÷8+21)×3
180×[1680÷(12+4)].
(1)350÷7+24×3
=50+72
=122;
(2)(720÷8+21)×3
=(90+21)×3
=111×3
=333;
(3)180×[1680÷(12+4)]
=180×[1680÷16]
=180×105
=18900.