3.997+19.96+1.9998+199.7(简算)

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3.997+19.96+1.9998+199.7(简算)
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3.997+19.96+1.9998+199.7(简算)
3.997+19.96+1.9998+199.7(简算)

3.997+19.96+1.9998+199.7(简算)
3.997+19.96+1.9998+199.7
=4-0.003+20-0.04+2-0.0002+200-0.3
=226-0.3432
=225.6568