### Planning and Activities

**Day 1**

Write the number sentence 3 + ☐ = 8. Children discuss. Hold up a strip of 8 cubes and beneath it a strip of 3 cubes. How many more cubes to make 8? Fill in the number sentence 3 + 5 = 8. Repeat for other bonds to 8.

**Further Teaching with Y2**

Use the bead frame to show linked additions and subtractions, e.g. 5 + 2, 15 + 2, 5 -2, 15 – 2.

**Group Activities: T with Y2**

Y1 -- Game to find the matching number to make 8. Order number bonds to 8; find matching number bonds partners.

Y2 -- Solve additions using number facts, focusing on place value of 10s digit. Solve additions and subtractions using number facts given on cards.

**Day 2**

Write 35 + 3, 27 – 5, 30 + 5, 46 + 6, 27 – 7, 56 + 3, and 99 – 3 on cards. Y1 What is 5 + 3? Y2 Can you see an addition where you could use this fact? Stick this card under a heading Number fact. Y2s How would you work out 27 – 5? 30 + 5? Stick the card under a heading Place value.

**Further Teaching with Y1**

Write 9 + 0, 3 + 6, 7 + 2, 4 + 5, 8 + 1. Show that we can write addition either way round. 3 + 6 = 9 and 6 + 3 = 9. Use these bonds to write subtraction facts, e.g. 9 – 4 = 5.

**Group Activities: T with Y1 or Y2**

Y1 -- Make number bonds to 9 with cubes in a feely bag.

Play a game creating number bond sentences with a partner.

Y2 -- Sort calculations according to the strategy used to solve them. Investigate equality using an on-screen interactivity.

**Day 3**

Children write the number facts to 8 on their whiteboards. Use pegs and a coat hanger to help children write related subtraction facts.

**Further Teaching with Y2**

Show a bead bar and demonstrate adding 8 and 5 by doing 8 + 2 + 3 (‘bridging’). Show on beaded and landmarked lines.

**Group Activities: T with Y2**

Y1 -- Make snakes of 8 and 9 cubes in 2 colours and record as a subtraction.

Y2 -- Develop understanding of bridging 10 when adding a 1-digit number to a 2-digit number using beaded lines or landmarked lines.

**Day 4**

Use dotty dice (i.e. with dots not numerals), asking children to add 3 numbers, 2 of which total 10. Discourage counting on in 1s. Encourage looking for known pairs that make 10, then add the remaining number.

**Further Teaching with Y2**

Use 1-100 grid and the beaded line to subtract 1-digit numbers from 2-digit numbers, bridging through multiples of 10.

**Group Activities: T with Y2**

Y1 -- Play a game of skittles, adding 3 numbers to find the total.

Y2 -- Children sort and solve subtractions by bridging 10, using 1-100 number grids, beaded or landmarked lines.

**Day 5**

Shuffle 2 packs of 0–9 digit cards, and take these 3 cards: 4, 3 and 4. Choose a strategy to add these (double 4 first, then count on 3). Repeat for other sets of 3 cards, then 5 cards encouraging different strategies such as starting with the largest number.

**Group Activities: T with Y1**

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

Or, use these activities:

Y1 -- Choose an efficient order to add three 1-digit numbers.

Y2 -- Choose an efficient order to add at least three 1-digit numbers