jordan1231 jordan1231
  • 25-10-2015
  • Mathematics
contestada

explain 2 ways to evaluate 15(90-3)

Respuesta :

Аноним Аноним
  • 25-10-2015
distribute the 15 first or subtract inside the parentheses first and then multiply
Answer Link
Аноним Аноним
  • 25-10-2015
First Way:

15(90-3)

=15(10*9-3)

=15*10*9-15*3

=150*9-45

=1,350-45

=1,305

-----------------

Second Way:

15(90-3)

=15(87)

=15(80+7)

=15(10*8+7)

=15*10*8+15*7

=150*8+(10+5)*7

=1,200+70+35

=1,200+105

=1,305
Answer Link

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