cervantesadrian6632 cervantesadrian6632
  • 24-09-2018
  • Mathematics
contestada

The model bellow represents the expression 5x18 . How many tens will there be in in the final product

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pinquancaro pinquancaro
  • 03-10-2018

Consider the expression [tex]5 \times 18[/tex]

Expanding 18 as (10+8),

= [tex]5 \times (10+8)[/tex]

By using distributive property, we get

= [tex]( 5 \times 10) + ( 5 \times 8)[/tex]

= 50 + 40

By adding, we get

= 90

The digit at units place is '0' and the digit at tens place is '9'.

Therefore, there are 9 tens in the final product of  [tex]5 \times 18[/tex].

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