Multiplication and division of decimals

Multiplication of Decimals

Multiplication of 2.8 and 7

  • 2.8 × 7 (There is only one digit to the right of the decimal point in 2.8)
  • 28 × 7 (Ignoring the decimals)
  • 28 × 7 = 196
  • Now bring the decimal back after one digit from left and thus answer is 19.6

Division of Decimals

Divide 3.4 by 2

  • \dfrac{{3.4}}{2}= Quotient
  • Ignore the decimal and divide the numerator by the denominator. Here, quotient  = \dfrac{{34}}{2} = 17
  • Since there is only one digit to the right of the decimal, put the decimal after one digit from left in the quotient. Therefore, quotient becomes 1.7
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