Multiplying By Nines

Multiply by

We have learnt how to multiply fractions.Two fractions are multiplied by multiplying their numerators and denominators seperately and writing the product as product of numerators product of denominators.For example,

The number of digits in the smallest number, which when multiplied by 7 yields all nines, is 3 (b) 4 (c) 5 (d) 6s

Write the expression for each of the following statements using brackets: Six multiplied by the sum of nine and four. The sum of four and six is multiplied by fifteen Divide the difference of eighteen and six by four. Fifty four divided by three times the sum of two and four.

Write the expression for each of the following statements using brackets: Four multiplied by the sum of 13 and 7. Eight multiplied by the difference of four from nine. Divide the difference of twenty eight and seven by 3. The sum of 3 and 7 in multiplied by the difference of twelve and eight.

Multiply 287 by 19.

If each observation is multiplied or divided by a non-zero number a; then mean is also multiplied by a.

A boy was asked to multiply a certain number by 50.He multiplied it by 30 and got his answer less then the correct one by 400.The number to be multiplied was: