4.02+3.5-0.98简便计算

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4.02+3.5-0.98简便计算

4.02+3.5-0.98简便计算
4.02+3.5-0.98简便计算

4.02+3.5-0.98简便计算
4.02+3.5-0.98
=4+0.02+3+0.5-0.98
=(4+3)+(0.02+0.5-0.98)
=7-0.46
=6.54

4.02+3.5-0.98
=4+0.02+3.5-(1-0.02)
=4+0.02+3.5-1+0.02
=4+3.5+0.02+0.02
=7.5+0.04
=7.54

解:=4.02+3.5-(1-0.02)
=4.02+3.5-1+0.02
=4.04+2.5
=6.54