如题所述
2.78✘101
=2.78×(100+1)
=2.78×100+2.78×1
=278+2.78
=280.78
=2.78×(100+1)
=2.78×100+2.78×1
=278+2.78
=280.78
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第1个回答 2020-09-23
简便运算是
2.78*101
=2.78*(100+1)
=2.78*100+2.78*1
=278+2.78
=280.78本回答被网友采纳
2.78*101
=2.78*(100+1)
=2.78*100+2.78*1
=278+2.78
=280.78本回答被网友采纳
第2个回答 2020-09-23
把101写成(100+1)
2.78×101
=2.78×(100+1)
=2.78×100+2.78
=278+2.78
=280.78
2.78×101
=2.78×(100+1)
=2.78×100+2.78
=278+2.78
=280.78
第3个回答 2022-09-20
2.78×101 =2.78×100+2.78 =278+2.78 =280.78