Teachers Guide ... Example: 28 + 27 = 55 20+20+8+2+5=55 (Note: There are many different strategies a student might use to calculate the answer to this problem.) ... In the latter stages of books D and E, addition and subtraction facts should be known and these can be used to derive multiplication and division ... For example, knowledge of a simple fact such as 5 x 6 = 30 can be used to calculate 7 x 6.
|Title||:||New Wave Mental Maths|
|Publisher||:||R.I.C. Publications - 2011|