1. Addition
Children build the number sentence using concrete equipment.

2. 5+3= Addition Step 1: Build number sentence with concrete equipment.
Step 2: build one part
Step 3: build the second part
Step 3: count and check to find the whole number
5+3=

3. Children use knowledge of number bonds to make 10.
Addition
8 +2 = 10
Children use knowledge of number bonds to make 10.

4. Addition
Try:
13+4=
15+3=
12+6=

5. Addition

7. Addition with regrouping the ones
Step 1: Build number sentence with base ten.
Step 2: First add the ones.
Step 3: Regroup the ones into tens and ones.
Step 4: Add the tens
Step 5: Add the hundreds = = =
Now try: =

8. Subtraction
Try:
9 – 4 =
6 – 2 =
8 – 5 =
10 – 4 =

9. Subtraction
Try:
19 – 8 =
16 – 2 =
18 – 5 =
17 – 4 =

10. Subtraction
Try:
28 – 8 =
37 – 12 =
45 – 11 =
22 – 10 =

12. Subtraction with regrouping the tens and the ones
Step 1: Build number sentence with base ten.
Step 2: Regroup the tens and ones.
Step 3: First subtract the ones.
Step 4: Subtract the tens.
Step 5: Subtract the hundreds = = =
Now try: =

13. Subtracting Numbers with 0s in
2000 – 257 =
Concrete Pictorial Abstract
Using the denes blocks to regroup
Using drawings to represent the numbers
Using the column subtraction with numbers and symbols

14. Subtracting Numbers with 0s in
Thousands
Hundreds
Tens
Ones
Step 1: Exchange one thousand for ten hundreds

15. Subtracting Numbers with 0s in
Thousands
Hundreds
Tens
Ones
Step 2: Exchange 1 hundred for 10 tens

16. Subtracting Numbers with 0s in
Thousands
Hundreds
Tens
Ones
Step 3: Exchange 1 ten for 10 ones

17. Subtracting Numbers with 0s in
Thousands
Hundreds
Tens
Ones
Now we have exchanged, we can now calculate it.

18. Subtracting Numbers with 0s in1
9 9 1 1 1
2000
Thousands
Hundreds
Tens
Ones
Step 4. Now subtract 257 from the number above.
( Ones first, then tens, hundreds and thousands )

19. Subtracting Numbers with 0s in
Thousands
Hundreds
Tens
Ones
2000
- 147
Now you try…. 1. Make Regroup ( Exchange ) the thousands, hundreds and tens 3. Then subtract 147

20. Understanding Decimals
Thousands
Hundreds
Tens
Ones
Tenths
Hundreths