When we round, we make a number simpler but keep its value close to what it was. The result is less accurate, but easier to use.

Something that is critical has crucial importance.

Rounding seven-digit numbers to any power of 10

Maths

Rounding 7-digit numbers to the nearest million

Solving calculations efficiently

Explore mental and written strategies to solve problems

Solve problems explaining which strategy is most efficient

In this unit pupils will use their knowledge of the composition of 7-digit numbers to solve problems adding and subtracting numbers whilst crossing the millions boundary They will round  7-digit numbers to the nearest million and nearest hundred thousand and solve addition and subtraction problems. In the future unit pupils round to any number of decimal places and learn about significant figures.

In the prior unit pupils estimated the value and position of numbers, including negative numbers, on unmarked or partially marked number lines and calculated intervals across 0. In this unit pupils will use their knowledge of the composition of seven-digit numbers to solve problems, adding and subtracting numbers whilst crossing the millions boundary.

In this unit pupils will use their knowledge of the composition of seven-digit numbers to round them and to solve problems, adding and subtracting numbers whilst crossing the millions boundary.

Rounding and solving problems with numbers up to 7 digits

Look at the number line. The next multiple of 100,000 after ‘A’ is {{ }}

Look at the number line. ‘A’ is {{ }} when rounded to the nearest multiple of 100,000

Complete: 4,602,001 is {{ }} when rounded to the nearest 100,000

Match the number to its rounded value when rounded to the nearest multiple of 100,000

2,349,530 is 2,350,000 when rounded to the nearest multiple of ___

Lucas thinks of a number. His number is 543,000 when rounded to the nearest 1,000 What is the smallest that his number could be?

Look at this sequence of numbers. What would come next?  4,300,000	4,400,000	4,500,000	{{ }}

Complete: 2,490,000 is {{ }} when rounded to the nearest multiple of one million.

Match the number to its rounded value when rounded to the nearest multiple of one million.

Select all the correct options. 139,000 is a multiple of ___

Complete: 539,000 is {{ }} when rounded to the nearest multiple of 100,000

Lucas thinks of a number. His number is 10,000 when rounded to the nearest one thousand. What is the smallest integer that his number could be?

Rounding seven-digit numbers to any power of 10

Lesson outcome