15.6+2.7-14.4简便方法怎么写
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15.6+2.7-14.4
=10+5.6+2.7-(10+4.4)
=(1O-1O)+(5.6-4.4)+2.7
=0+1.2+2.7
=1.2+2.7
=3.9
=10+5.6+2.7-(10+4.4)
=(1O-1O)+(5.6-4.4)+2.7
=0+1.2+2.7
=1.2+2.7
=3.9
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展开全部
15.6+2.7-14.4 =10+5.6+2.7-(10+4.4) =(10-10)+(5.6-4.4)+2.7 =0+1.2+2.7 =1.2+2.7 =3.9
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