4.29+3.19/(22-19.7)要简算

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4.29+3.19/(22-19.7)要简算4.29+3.19/(22-19.7)要简算4.29+3.19/(22-19.7)要简算原式=﹙4.3-0.01﹚+(3.2-0.01)/(20-19.7+

4.29+3.19/(22-19.7)要简算
4.29+3.19/(22-19.7)要简算

4.29+3.19/(22-19.7)要简算
原式=﹙4.3-0.01﹚+(3.2-0.01)/(20-19.7+2)
=4.3-0.01+(3.2-0.01)/2.3
=4.3-0.01+3.2/2.3-0.01/2.3
=﹙4.3+3.2/2.3﹚-﹙0.01+0.01/2.3﹚
=﹙98.9/2.3+3.2/2.3﹚-﹙0.023/2.3+0.01/2.3﹚
=102.1/2.3-0.033/2.3
=﹙102.1-0.033﹚/2.3
=102.067/2.3
=102067/2300