计算下面各题能简算的要简算.
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/10/04 20:36:02
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. |
(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
=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