如题所述
第1个回答 2011-10-07
2.3×10.2
=2.3×10+2.3×0.2
=23+0.46
=23.46本回答被提问者采纳
=2.3×10+2.3×0.2
=23+0.46
=23.46本回答被提问者采纳
第2个回答 2011-10-07
2.3×10.3
=2.3×(10+0.2)
=2.3×10+2.3×0.2
=23+0.46
=23.46
=2.3×(10+0.2)
=2.3×10+2.3×0.2
=23+0.46
=23.46
第3个回答 2011-10-07
把10.2看成10+0.2然后变成(10+0.2)*2.3
就是10*2.3+0.2*2.3就是23.46
就是10*2.3+0.2*2.3就是23.46