At stage 4 you are working on :
Addition and Subtraction that includes ten or twenty
18-10 10+9 10+?=14 15 - ? = 10 20 - 13 =
Bonds using tens to make 100
30 + ? = 100 100 - 40 =?
Doubles and Halves to 20
half of 12 8 + 8
Strengthening all the addition and subtraction up to 10
4+5 = 6 + ? = 8 5 - 2 =
Find activities on the sites below that help
Explore for yourself or do an activity written in your homework book
Addition : Bonds to make 20
Addition: Bonds to make 100
Subtraction: Up to 20
Explore other activities once these ones are easy
Start doing x2 basic facts as these are the same as doubles for addition.
Always do a test before practicing and then see how much you can improve by over the week.