脱式计算5.6加2.7加4.5————77加2.7加2.8加25
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5.6+2.7+4.5
=8.3+4.5
=12.8,
7.7+2.7+2.8+25
=10.4+2.8+25
=13.2+25
=38.2,
8.7-5.69+2.03
=3.01+2.03
5.04,
51.27-8.03-1.34
=43.24-1.34
=41.9,
10.75+0.4-9.86
=11.15-9.86
=1.29,
请采纳
=8.3+4.5
=12.8,
7.7+2.7+2.8+25
=10.4+2.8+25
=13.2+25
=38.2,
8.7-5.69+2.03
=3.01+2.03
5.04,
51.27-8.03-1.34
=43.24-1.34
=41.9,
10.75+0.4-9.86
=11.15-9.86
=1.29,
请采纳
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