题目内容

直接写出得数.
4.5+2.7=0.21×4=210÷0.7=3.9×2÷3.9×2=
2.5×8=4.5÷0.5=10-0.42=0.62÷0.62-1=
4.5+2.7=7.2,0.21×4=0.84,210÷0.7=300,3.9×2÷3.9×2=4,
2.5×8=20,4.5÷0.5=9,10-0.42=9.58,0.62÷0.62-1=0.
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