### Planning and Activities

**Day 1**Write 4.378. Discuss digit place value, saying both the fraction and the decimal. Play decimal number bingo to subtract the value of a digit from a 4-digit number with three decimal places. Show cans/jars with masses in grams. Convert the masses into kg. Convert millilitres to litres and kilometres to metres.

**Group activities: T with Y5**

Y5 -- Use digit cards on a place value grid to convert between km and m, l and ml.

Y5/6 -- Order weights in kg with different numbers of decimal places. Convert to grams to check.

Y6 -- Order numbers with one, two and three decimal places.

**Day 2**Write ☐.☐☐☐ > ☐.☐☐☐. Place 0 to 9 cards to make it true. Write a number in between. Repeat with ☐.☐☐☐ < ☐.☐☐☐. Order numbers with three decimal places. Think of one number between each neighbouring pair of numbers: one with one decimal place, one with two decimal places and one with three decimal places. Enter 1 ÷ 3 on the calculator. Discuss rounding errors. Repeat with ÷ 4, ÷ 5 and ÷ 6.

**Group activities: T with Y5**

*Use the in-depth problem-solving investigation ‘Guesstimate’ as today’s group activity.*

Or, use these activities:

Y5 -- Play a number line game to practise ordering numbers with three decimal places.

-- Play a number line game to practise ordering numbers with one, two or three decimal places.

Y6 -- Investigate divisors 2 to 10 that will give rounding errors on the calculator.

-- Investigate divisors 2 to 20 that will give rounding errors on the calculator.