5.6 2.7 4.5简算计算

请问5.6+2.7+4.5的简便方法到底怎么算,如果知道请告诉我谢谢!

5.6+2.7+4.5简便计算=(5.6+4.5)+2.7=10.1+2.7=12.8

用凑整法简算原式=5.6+4.5+2.7=5.6+4.4+(0.1+2.7)=10+2.8=12.8

=(5.6+4.4)+2.7=10+2.7=12.7

5.6+2.7+4.5=(5.5+4.5)+(2.7+0.1)=10+2.8=12.8

5.6+2.7+4.5=5.6+4.5+2.7=5.6+4.4+0.1+2.7=(5.6+4.4)+(0.1+2.7)=10+2.8=12.8

5.6+2.7-4.4=5.6+4.4+2.7-8.8=12.7-8.7-0.1=4-0.1=3.9

5.6+2.7+4.4=(5.6+4.4)+2.7=10+2.7=12.7

5.6+2.7+4.5=5.5+0.1+4.5+2.7=10+2.8=12.8

5.6+4.4+2.7+0.1=12.89.14-(1.43+4.57)=3.1477+23+2.7+2.8+2=107.50.38+(0.36+2.64)=3.389.5-6.1+4.85-0.03=8.22

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