Whole

SNIF 82.2

SPUT 553.9

GYMBLE 5.88

CHORTLE 0.84

MIMSY 488.70

DOSH 5.35

BLOP 80.48

PLECK 2.4999

LAMBTON 0.41

TUCKLE-TIK 348.70

Round each of the numbers on the signs to the nearest whole number then add all of your answers together.

# Rounding to the nearest whole number

## A Mathematics Lesson Starter Of The Day

Topics: Starter | Approximation | Arithmetic | Rounding

• Transum,
•
• Pupils should be very familiar with the concept of rounding as they begin to study topics that provide ample opportunity to practice this skill. Mensuration of a circle, trigonometry and statistics spring to mind as well as topics in Science and Geography. When working on multi-step solutions to problems they should be shown the issues of rounding too early. Sometimes known as premature approximation, this practice will introduce unnecessary errors in the final answer.
• Cosette, St. Gregs
•
• This was a very fantastic review, I loved it especially the names of the sign! “Blop”.

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.

Previous Day | This starter is for 20 October | Next Day

 Snif 82 Sput 554 Gymble 6 Chortle 1 Mimsy 489 Dosh 5 Blop 80 Pleck 2 Lambton 0 Tuckle-tik 349

### 1568

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.

## Extension

Do you know how to round negative numbers? If values exactly half way between get rounded up should -37.25 be rounded to -37.2 or -37.3? Does ‘rounded up’ mean rounded to the larger value or the value furthest away from zero?

A system of rounding commonly used in bookkeeping and some computing procedures is called ‘round half to even’. In this system half way values are rounded either up or down in order to make the last digit an even number.

So, for example, 37.25 becomes 37.2, 37.15 also becomes 37.2 and −37.25 becomes −37.2 without any doubt.

This method of rounding is also useful when rounding values in large data sets as it evens out the rounding ups and rounding downs for the half way values.

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Educational Technology on Amazon

 Teacher, do your students have access to computers?Do they have iPads or Laptops in Lessons? Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Transum.org/go/?Start=October20

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=roundingdp

## Curriculum Reference

See the National Curriculum page for links to related online activities and resources.

For Students:

For All: