问题 解答题
6+0.39=100-5.4-4.6=2.8+6.3+7.2=1000×0.78=
72×25×4=78×5÷78×5=7-6.28=24×5=
5÷1000=
1
5
-0.08=
答案

6+0.39=6.39100-5.4-4.6=902.8+6.3+7.2=16.31000×0.78=780
72×25×4=720078×5÷78×5=257-6.28=0.7224×5=120
5÷1000=0.005
1
5
-0.08=0.12

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