text: Math .A Tube.com
   .
  ........................................................................................................................................................................................
  Multiply and Divide  by Multiples 10
   video
   .
  Related pages
   video
   Remember:factor x factor = product
  Multiply and Divide  by Multiples 10
  Multiples of 10, 100, 1,000
  Multiply by Multiples 10
  Multiply the whole numbers in each. Add as many zeros as
  there are in the factors to the product.
  Example:    40 x 90 = ?
  Multiply the whole numbers ( 4 x 9 = 36
  Add the zeros to the 36 (3600
  answer:    40 x 90 = 3,600
  Example 2: 500 x 30 = ?
  5 x 3 = 15, add three zeros (15000). Answer: 500 x 30 = 15,000
  Divide  by Multiples 10
  .........................................................................................................................
  Divide the front digits and write the quotient.
  Cross out the zeros that match up from both numbers.
  Example: 3,500 ÷ 70
  1: Rewrite the dividend and divisor using multiples of 10
  3,500 = 350 x 10
  and
  70 = 7 x 10
  2: Divide 350 by 7
  350 ÷ 7 = 50
  3,500 ÷ 7 = 50
   Remember:dividend ÷ divisor = quotient