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3 years ago

Explain 2 ways to evaluate 15(90-3)

Mathematics

2 answers:

Elena L [17]3 years ago

8 0

Distribute the 15 first or subtract inside the parentheses first and then multiply

pychu [463]3 years ago

5 0

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

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