1樓:義明智
簡便計算
72ⅹ520 十280x52
=72x520+28x520
=(72+28)x520
=100x520
=52000
2樓:火星
方法1:
72x520+280x52
=720x52+280x52
=(720+280)x52
=1000x52
=52000
方法2:
72x520+280x52
=72x520+28x520
=(72+28)x520
=100x520
=52000
3樓:寬寬的河
72ⅹ520 十280x52
=72ⅹ520 十28x520
=(72+28)ⅹ520
=100ⅹ520
=52000
4樓:小
把280的10借給52
72×520+280×52
=72×520+28×10×52
=72×520+28×520
=(72+28)×520
=100×520
=52000
5樓:來自虎形山歡欣鼓舞的玉蝶梅
72x520+280x52
=72x520+28x520
=(72+28)x520
=100x520
=52000
6樓:
72x520+280x52 =720x52+280x52= (720+280)x52=1000x52=52000
72ⅹ520十 280x52用簡便方法怎麼計算?
7樓:蝸牛
72×520+280×52
=72×520+28×520
=520×(72+28)
=520×100
=52000
8樓:
原式=720×52+280×52
=52×(720+280)
=52×1000
=52000
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