9.9×25用简便方法计算,
9.9Ã25
=ï¼10-0.1ï¼Ã25
=10Ã25-0.1Ã25
=250-2.5
=247.5
=ï¼10-0.1ï¼Ã25
=10Ã25-0.1Ã25
=250-2.5
=247.5
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第1个回答 2018-09-18
9.9×25
=(10-0.1)x25
=10x25-0.1x25
=250-2.5
=247.5
希望能帮到你!
=(10-0.1)x25
=10x25-0.1x25
=250-2.5
=247.5
希望能帮到你!