四点五除零点九用脱式计算

Question

四点五除零点九用脱式计算

Answer 1

4.5÷0.9=5
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Answer 2

4.5÷0.9
=45÷9
=5

Answer 3

4.5÷0.9
=5x0.9÷0.9
=5

Answer 4

4.5÷0.9=5