We found this a bit tricky today so we used cubes to help us. Some children knew lots of number facts which helped them work it out more quickly. Here is our method-
Double 15
10+10 = 20 5+5=10 so 20+10= 30
Halve 26
half of 20/ 20 divided by 2/ cut 20 in half equally = 10 half of 6= 3 so 10+3=13
Practise these at home.
Double 15
10+10 = 20 5+5=10 so 20+10= 30
Halve 26
half of 20/ 20 divided by 2/ cut 20 in half equally = 10 half of 6= 3 so 10+3=13
Practise these at home.