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用简便方法计算.46×99+4625×32×125226×13-26×13304+297(354+172)+(228+146)28×360+360×72
题目详情
用简便方法计算.
46×99+46 | 25×32×125 | 226×13-26×13 |
304+297 | (354+172)+(228+146) | 28×360+360×72 |
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答案和解析
=46×(99+1)
=46×100
=4600
(2)25×32×125
=25×4×8×125
=(25×4)×(125×8)
=100×1000
=10000
(3)226×13-26×13
=(226-26)×13
=200×13
=2600
(4)304+297
=(300+4)+(300-3)
=(300+300)+(4-3)
=600+1
=601
(5)(354+172)+(228+146)
=(354+146)+(172+228)
=500+400
=900
(6)28×360+360×72
=(28+72)×360
=100×360
=36000
(1)46×99+46 |
=46×100
=4600
(2)25×32×125
=25×4×8×125
=(25×4)×(125×8)
=100×1000
=10000
(3)226×13-26×13
=(226-26)×13
=200×13
=2600
(4)304+297
=(300+4)+(300-3)
=(300+300)+(4-3)
=600+1
=601
(5)(354+172)+(228+146)
=(354+146)+(172+228)
=500+400
=900
(6)28×360+360×72
=(28+72)×360
=100×360
=36000
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