早教吧 育儿知识 作业答案 考试题库 百科 知识分享

计算下面各题456+322+178(780-724)×1560+40×375-75÷5720÷8×919×(100-78)(86+54)÷28973-245-2551800-1800÷15.

题目详情
计算下面各题
456+322+178(780-724)×1560+40×3
75-75÷5720÷8×919×(100-78)
(86+54)÷28973-245-2551800-1800÷15.
▼优质解答
答案和解析
(1)456+322+178
=456+(322+178)
=456+500
=956;

(2)(780-724)×15
=56×15
=840;

(3)60+40×3
=60+120
=180;

(4)75-75÷5
=75-15;
=60;

(5)720÷8×9
=90×9
=810;

(6)19×(100-78)
=19×22
=418;

(7)(86+54)÷28
=140÷28
=5;

(8)973-245-255
=973-(245+255)
=973-500
=473;

(9)1800-1800÷15
=1800-120
=1680.