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(1)7
(2)6
4.3-2.8=
7.6-0.6=
5.5+4.1=
3.3-1.4=
9-6.5=
16.2+7.8=
12.7-6.7=
3-2.15=
3.72+4.28=
1.25-0.2=
2-0.37=