Now we are going to extend that idea and look at some questions that have a combination of large and small numbers. It's really important to think about place value with these questions, and you may find sketching out a place value table will help.
If $2\times8=16$2×8=16, what is $20\times8$20×8?
Record and interpret additive and simple multiplicative strategies, using words, diagrams, and symbols, with an understanding of equality
Generalise the properties of addition and subtraction with whole numbers