Exploring commutativity in multiplication

Maths

A maths law - the order of addends and factor cannot be changed.

A maths law - the order of addends and factors can be changed but the result is still the same.

Which of the following options is incorrect?

What is the missing word?  If there are ten or more ones, we must ______________ the ones into tens and ones.

Do you need to regroup ones into tens when calculating 11 x 7?

Do you need to regroup tens when calculating 43 x 4?

What do you need to regroup when calculating 45 x 5?