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Multiply and divide decimals by 10

86.09×110=86.09\times \dfrac1{10}=
Multiplying by 110\dfrac1{10} is the same as dividing by 1010.
[Check out why]
=86.09×110\phantom{=}86.09\times \dfrac\blueD1\greenD{10}
=86.09×(1÷10)=86.09\times(\blueD1\div\greenD{10})
=(86.09×1)÷10=(86.09\times\blueD1)\div\greenD{10}
=86.09÷10=86.09 \div\greenD{10}