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3.24÷[(8.3-6.8)×0.9]=
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3.24
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A
B
C
D
________+6=10
5+________=9
3+________=8
________+________=7
9+________=19
________+4=6
5元3角+2元6角=________元________角
20元-9元5角=________元________角
80元-65元=________元
8角+2元2角=________元