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(8 x 10) / (2 x 10) = 80 / 20 = 4
However [(8 x 10)/2 ] x 10 = 400
When mixing words and symbols it is important to make the desired order of operations clear.
8x10
fractions divided to quotient
65
50.7451
33
2x10+8x10+7x10+6x10
8X10=80 80 divided by 2 = 40
5.21
800
29.5
5.6667
400