题目内容

用简便方法计算.
15-0.3=
6-0.5=3.9+12.1=2.13+14=0.91+1.25=
10-0.76=3.99-0.9=0.567+4.44=0.37+0.6=7.46+2.54=
1-0.08=45.9+1=6.87-3.25=0.25+0.75=0.78+0.22=
6.1-5.7=
15-0.3=14.7,6-0.5=5.5,3.9+12.1=16,2.13+14=16.13,0.91+1.25=2.16,
10-0.76=9.24,3.99-0.9=3.09,0.567+4.44=5.007,0.37+0.6=0.97,7.46+2.54=10,
1-0.08=0.92,45.9+1=46.9,6.87-3.25=3.62,0.25+0.75=1,0.78+0.22=1,
6.1-5.7=0.4.
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