You can do the easy bits first. Thus, to calculate 7*5*2, instead of doing 35*2 = 70, you can calculate 7*10 = 70. By itself, the associative property is not as useful as it is in combination with the commutative and distributive properties.
Devide them into smaller sections
property of divisiion
You don't because you only need to do the multiplication problem.
partheses because that the first order of operation
The multiplication property of equality is, as the name suggests, a property. It does not require solving!
you solve the problem in your head with no help from calculators or number lines ect..
Because you need to use inverse operations and the opposite of multiplication is division.
division property of equality or multiplication property, if you multiply by the reciprocal