问题
解答题
计算.
15×(38+46)÷21
640÷[(14+6)×16]
(380-240÷20)÷23.
答案
(1)15×(38+46)÷21,
=15×84÷21,
=15×4,
=60;
(2)640÷[(14+6)×16],
=640÷[20×16],
=640÷320,
=2;
(3)(380-240÷20)÷23,
=(380-12)÷23,
=368÷23,
=16.
计算.
15×(38+46)÷21
640÷[(14+6)×16]
(380-240÷20)÷23.
(1)15×(38+46)÷21,
=15×84÷21,
=15×4,
=60;
(2)640÷[(14+6)×16],
=640÷[20×16],
=640÷320,
=2;
(3)(380-240÷20)÷23,
=(380-12)÷23,
=368÷23,
=16.