### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Use place value to add multiples of 1, 10, 100 to 2-digit and 3-digit numbers.**Further Teaching with Y4**

Place value additions with up to 4-digits.**Group Activities: T with Y4**

Y3 -- Add multiples of 1s, 10s (and 100s) to 3-digit numbers.

Y4 -- Use place value and number facts to add 3-digit and 4-digit numbers.

**Day 2 Teaching**

Add near multiples of 10 to 2 and 3-digit numbers.**Group Activities: T with Y3**

Use the in-depth problem-solving investigation for this unit ‘Magic 147’ as today’s group activity.

Or, use these activities:

Y3 -- Hexagon Multiples addition game: add multiples of 10 and related near multiples.

Y4 -- Solve and make up word problems involving adding multiples and near multiples of 10 or 100 to a 3-digit number.

**Day 3 Teaching**

Use place value to subtract multiples of 1, 10, 100 from 2-digit and 3-digit numbers (Y4 4-digits).**Further Teaching with Y3**

More guided practice on whole-class teaching.**Group Activities: T with Y3**

Y3 -- Subtract 1s, 10s and 100s from 3-digit numbers.

Y4 -- Subtract multiples of 1, 10 and 100 from 3-digit and 4-digit numbers.

**Day 4 Teaching**

Subtract near multiples of 10 and 100 from 2 and 3-digit numbers.**Group Activities: T with Y3**

Y3 -- Subtract multiples of 10 and related near multiples.

Y4 -- Use an empty number line to subtract near multiples of 10 and 100 from 3-digit numbers.