### Teaching and Group Activities for Understanding

**Day 1**

Look at the pattern of digits on a 10s, 1s, 0.1s and 0.01s place value chart. Make numbers with 2 decimal places by ringing and recombining a number in each row. Divide 3-digit numbers by 100.**Further Teaching with Y6**

Make numbers with 3 decimal places by ringing and recombining numbers on a 10s, 1s, 0.1s, 0.01s and 0.001s place value chart.

**Group Activities: T with Y6**

Y5 -- Play a game using the place value grid to reinforce the value of different digits. Other children will ‘Zap’ digits in numbers with 2 decimal places, using a calculator.

Y6 -- Write place value additions, divide by 10 and 100 (numbers/answers with up to 3 decimal places; includes pre-teaching for Day 2). Other children will play I’m thinking of a number with 3dp place value additions/subtractions.

**Day 2**

Children hold four number cards either side of a large decimal point and move in response to ×/÷10, 100 and 1000 instructions.**Group Activities: T with Y5**

Use the in-depth problem-solving investigation ‘Dicey Operations in Line’ from NRICH as today’s group activity.

Or, use these activities:

Y5 -- Use digit cards in place value grids to multiply and divide by 10 and 100 (up to 2 decimal places).

Y6 -- Create inputs and outputs for function machines, or play a reasoning game, to rehearse × 10, ÷ 10, × 100, ÷ 100, × 1000 or ÷ 1000.

**Day 3**

Use a 0–100 bead bar and 10-part counting stick to teach where numbers with 2 decimal places belong, between adjacent multiples of 1, on the number line.**Further Teaching with Y6**

Place numbers with 3 decimal places on landmarked and empty number lines and round to nearest whole, tenth and hundredth.

**Group Activities: T with Y6**

Y5 -- Play one team against the other to place numbers with 2 decimal places on a line, trying to stop opponents getting numbers in between.

Y6 -- Order numbers with 3 decimal places, place on landmarked lines to check. Some children will also round numbers to the nearest whole and tenth.