Question

An estimate for the value of5.1 x 98

Answer 1

Given the expression;

`5.1*98`

We can find the solution by finding the product of the values.

This can be seen below;

To estimate a number, we first round off the number using the general rule, which is, we look at the digit to the right of the digit that we want to round off, if it is less than 5, then the value of the digit is not changed, if the digit to the right is 5 or more than 5, then the value of digit which we are rounding off becomes 1 which is added to the next digit.

`5.1*98=499.8\approx500`

Answer: The estimate of the expression is 500