To change a number into another number that is approximately the same value but is easier to work with. E.g. round 561 to the nearest 10 is 560.

Checking understanding of rounding

Maths

In this unit, pupils have learnt how to round to a given number of decimal places or significant figures and explored the effect of using rounded numbers for calculations. In the future unit, pupils will investigate the bounds and perform calculations to determine a best/worst case scenario.

The prior unit on place value allowed pupils to develop the skills needed to estimate and round values. By understanding the value of each digit, pupils can determine what other values are close to the original value. This unit continues the exploration of the infinite nature of sets of numbers.

Estimation and rounding

Rounding means to change a number into another number that is {{ }} the same value but is easier to work with.

13 745 rounded to the nearest thousand is {{}}.

Lucas buys a t-shirt costing £14.75.  What is the cost of the t-shirt to the nearest pound?

Jun writes 378 as approximately 400.  Jun has written it to the {{ }} hundred.

Which digit is in the thousands column in 43 978? {{}}

Which digit is in the tens column in 3492? {{}}

In the number 57.392, which column is the 3 in? 

In the number 57.392, which column is the 2 in?

The number that is halfway between 3 and 4 is {{}}

This lesson will soon be taken down.

Checking understanding of rounding

Lesson outcome