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用简便方法计算:168-32-68325×99+32528×25125×32×2538000÷125÷8101×79.
题目详情
用简便方法计算:
168-32-68 | 325×99+325 | 28×25 |
125×32×25 | 38000÷125÷8 | 101×79. |
▼优质解答
答案和解析
(1)168-32-68
=168-(32+68)
=168-100
=68
(2)325×99+325
=325×(99+1)
=325×100
=32500
(3)28×25
=(7×4)×25
=7×(4×25)
=7×100
=700
(4)125×32×25
=125×(8×4)×25
=(125×8)×(4×25)
=1000×100
=100000
(5)38000÷125÷8
=38000÷(125×8)
=38000÷1000
=38
(6)101×79
=(100+1)×79
=100×79+1×79
=7900+79
=7979
=168-(32+68)
=168-100
=68
(2)325×99+325
=325×(99+1)
=325×100
=32500
(3)28×25
=(7×4)×25
=7×(4×25)
=7×100
=700
(4)125×32×25
=125×(8×4)×25
=(125×8)×(4×25)
=1000×100
=100000
(5)38000÷125÷8
=38000÷(125×8)
=38000÷1000
=38
(6)101×79
=(100+1)×79
=100×79+1×79
=7900+79
=7979
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