# N1/L1.8

Approximate by rounding

a) understand that numbers can be rounded to different degrees of accuracy e.g. to nearest 10, 1000, 10 000, million)

An activity using mobile phones. Students could also do a warm-up by measuring and weighing real phones (switched off)!

The lesson was designed for an E3 young learner class. The last section, using percentage changes, might suit stronger learners (L1 extension).

**Editor’s note**

Fully mapped to the Functional Maths criteria. Covers rounding whole nos. and decimals, money, percentages, fractions and area.

Introduce the topic using the Smart Notebook activity.

8 identical pages, each with a blank number line, a movable arrow to show the position of the number to be rounded and a sentence at the bottom to state what is happening.

Learners can fill in the ends of the number line to see what values are relevant to the question i.e. rounding 23 to the nearest 10 would be either 20 or 30 as an answer. Then they can move the arrow to the position needed, 23, then see which value the number is closest to.

Five wonderful sets of multiple choice revision questions covering Level 1 ratio, mean & range, fractions, percentages, and number (mostly place value & rounding). Each set consists of 9 cards and is individually mapped to the numeracy curriculum.

Cut up into cards and use as required. Use individual sets for targeted revision or mix with other sets of cards for general revision.

This spreadsheet is designed to enable students to check their own work; but also to learn about what happens when you add two decimals, or multiply two fractions, and so on.

The spreadsheet consists of the following sheets:

A fabulous, very clear lesson plan ideal for money-management / personal finance classes. The mathematical focus is on percentages (VAT) but it also covers rounding and extracting data and can be used in mixed ability classes from E2 -L2.

The plan also includes links to online Budget videos, a ‘chop or not’ game, VAT calculators and more!

Also suitable for underpinning L1 Functional Maths, and linked to Education for Sustainable Development and Global Citizenship (ESDGC).

Practise percentages starts with a some questions based on the results of a survey in a college canteen – emphasising that percentages are ‘out of 100’. There is also a separate set of simple percentage increase / decrease questions.

A super differentiated whole group activity (E2 – L2) for spring, summer or autumn. Covers measures, area, rounding, substitution and more.

Rounding presentation makes clever use of number lines and animation to demonstrate rounding whole numbers (nearest 10, 100, 1000) and decimals (nearest whole number, 1 and 2 d.p.) and using significant figures. Please ensure that you also download the accompanying PDF document (see below) with useful teaching notes and ideas for adapting the PPT for your own learners.