We can use a number line to help us to round decimals to the nearest whole number. First we identify the two whole numbers our decimal is between. Then we use the number line to think about which whole number our number is nearest.
For example.
4
4.47
5
4.47 rounded to the nearest whole number
We can also use a number line to help us to round decimals to the nearest one decimal place. First we identify the decimals with 1 decimal place our number is between. Then we use the number line to think about which decimal our number is nearest.
4.47
4.47 rounded to one decimal place
4.4 4.5
Label the ends of your number line and use the same method to round 7.56 to:
1) the nearest whole number
2) the nearest one decimal place
3) Complete the table
7.56 rounded to the nearest whole number
7.56 rounded to the nearest one decimal place
Rounded to the nearest whole number Rounded to the nearest one decimal place
4.72
7.08
3.57
12.84
4) Circle all the numbers which give 1.8 when rounded to the nearest one decimal place.
1.76 1.86 1.84 1.08 11.8 1.75 1.85
5) Gabs chooses two of these cards. She adds them together and then rounds her answer to the nearest whole number. Her answer is 4.
Tick the two cards she chose.
2.8 0.6 1.9 3.9 3.6

Answers:
1) 8
3) 7.6
4) 1.76, 1.84, 1.75
5) 0.6 & 3.6
Round decimals with two decimal places to the nearest whole number and to one decimal place
3)
4.72
Rounded to the nearest whole number
5
Rounded to the nearest one decimal place
4.7
7.08
3.57
12.84
7
4
13
7.1
3.6
12.8
http://mathsframe.co.uk/en/resources/resource/53/rounding
Uses a number line to help children think about place value and rounding. Choose to round whole numbers or decimals. http://mathsframe.co.uk/en/resources/resource/238/Rounding_Answers
Perform a calculation on a calculator and then round the answer to a given degree of accuracy. Choose to round whole numbers or decimals. http://mathsframe.co.uk/en/resources/resource/275/Rounding_Crystal_Crash
Throw your pickaxe at the correct answer and clear the cave of crystals. Lots of choice over level. Levels are linked to the new maths curriculum. http://mathsframe.co.uk/en/resources/resource/289/
KS2_Maths_Invaders
Shoot the spaceship with the correct answer. Lots of choice over level.
Levels are linked to the new maths curriculum. http://mathsframe.co.uk/en/resources/resource/290/
Snake_KS2_Maths_Game
Guide the snake to the correct answer. Lots of choice over level. Levels are linked to the new maths curriculum.