### Planning and Activities

**Day 1 Teaching**

Model multiplying and dividing by 10 using a place value grid.**Further Teaching with Y4**

Divide by 10 to give tenths using decimal place value grid.**Group Activities: T with Y4**

Y3 -- Create 2-digit numbers and multiply and divide them by 10. Record these calculations. Some children challenge others to guess a starting number by giving the answer to × 10 questions.

Y4 -- Move digit cards on a place value grid to divide 2-digit numbers by 10. Write a generalisation.

**Day 2 Teaching**

Model multiplying and dividing by 10 and 100 using a place value grid.**Further Teaching with Y4**

Multiply 1 place decimals by 10, moving digits across the decimal point. Use function machine to x10 and ÷10.**Group Activities: T with Y3**

Use the in-depth problem-solving investigation ‘Testing 10s’ as today’s group activity.

Or, use these activities:

Y3 -- Play a divide and multiply card game.

Y4 -- Use a function machine or play bingo to practise multiplying and dividing numbers by 10.

**Day 3 Teaching**

Model multiplying and dividing by 10 and 100 (one-place decimals) using ITP ‘Moving digits’.

**Further Teaching with Y3**

Multiplying and dividing by 10 and 100 using money.**Group Activities: T with Y3**

Y3 -- Multiply and divide shop prices by 10 and 100.

Y4 -- Find different routes through a maze (× 10, ÷ 10, × 100, ÷ 100) where the same number will come out exactly as it was entered.