How do you simplify #-2.7times 3.9#?

1 Answer
Truong-Son N.
Aug 27, 2016

You can multiply by #10# twice to scale both decimals, then divide your answer by #10# twice to reverse it.

#color(blue)(-2.7xx3.9)#

#= 1/100(-27xx39)#

#= 1/100(-30xx39 - (-3 xx 39))#

#= 1/100(-1170 - (-117))#

#= 1/100(-1170 + 117)#

#= 1/100(-1053)#

#= color(blue)(-10.53)#

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