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计算下面各题.(怎样简便就怎样算)(1)25×142×4(2)945÷15-28(3)432÷36×105(4)36×99+36(5)180×[840÷﹙140-70)].
题目详情
计算下面各题.(怎样简便就怎样算)
(1)25×142×4
(2)945÷15-28
(3)432÷36×105
(4)36×99+36
(5)180×[840÷﹙140-70)].
(1)25×142×4
(2)945÷15-28
(3)432÷36×105
(4)36×99+36
(5)180×[840÷﹙140-70)].
▼优质解答
答案和解析
(1)25×142×4
=25×4×142
=100×142
=14200;
(2)945÷15-28
=63-28
=35;
(3)432÷36×105
=12×105
=1260;
(4)36×99+36
=36×(99+1)
=36×100
=3600;
(5)180×[840÷﹙140-70)]
=180×[840÷70]
=180×12
=2160.
=25×4×142
=100×142
=14200;
(2)945÷15-28
=63-28
=35;
(3)432÷36×105
=12×105
=1260;
(4)36×99+36
=36×(99+1)
=36×100
=3600;
(5)180×[840÷﹙140-70)]
=180×[840÷70]
=180×12
=2160.
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