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计算下面各题能简算的要简算.

来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/09/22 21:25:37
计算下面各题能简算的要简算.
672-36-64           26×76+26×24           98+265+202
99×26               32×125×25           576-(176+280)
32×101-32            89×99+89            1050÷15÷7.
计算下面各题能简算的要简算.
(1)672-36-64 
=672-(36+64)
=672-100
=572
(2)26×76+26×24 
=26×(76+24)
=26×100
=2600  
(3)98+265+202
=98+202+265
=300+265
=565              
(4)99×26
=(100-1)×26
=100×26-1×26
=2600-26
=2574 
(5)32×125×25 
=4×8×125×25
=(4×25)×(8×125)
=100×1000
=100000 
(6)576-(176+280)
=576-176-280
=400-280
=120                           
(7)32×101-32
=32×(101-1)
=32×100
=3200 
(8)89×99+89
=89×(99+1)
=89×100
=8900
(9)1050÷15÷7 
=1050÷(15×7)
=1050÷105
=10