![SOLVED:Mental math You can use binomial multiplication to multiply numbers without a calculator. Say you need to multiply 18 times 17 . Think of 18 as 20-2 and 17 as 20-3 . ( SOLVED:Mental math You can use binomial multiplication to multiply numbers without a calculator. Say you need to multiply 18 times 17 . Think of 18 as 20-2 and 17 as 20-3 . (](https://cdn.numerade.com/previews/3221b8be-4d01-4d21-b79c-7bd5ecfd5e76.gif)
SOLVED:Mental math You can use binomial multiplication to multiply numbers without a calculator. Say you need to multiply 18 times 17 . Think of 18 as 20-2 and 17 as 20-3 . (
![SOLVED:You can use binomial multiplication to multiply numbers without a calculator. Say you need to multiply 13 times 15. Think of 13 as 10 + 3 and 15 as 10 + 5. ( SOLVED:You can use binomial multiplication to multiply numbers without a calculator. Say you need to multiply 13 times 15. Think of 13 as 10 + 3 and 15 as 10 + 5. (](https://cdn.numerade.com/previews/a372c3f6-3612-43fc-ab96-2e87404d1fe5.gif)
SOLVED:You can use binomial multiplication to multiply numbers without a calculator. Say you need to multiply 13 times 15. Think of 13 as 10 + 3 and 15 as 10 + 5. (
![SOLVED:Mental math You can use the binomial squares pattern to multiply numbers without a calculator. Say you need to square 65 . Think of 65 as 60+5. (a) Multiply (60+5)^{2} by using SOLVED:Mental math You can use the binomial squares pattern to multiply numbers without a calculator. Say you need to square 65 . Think of 65 as 60+5. (a) Multiply (60+5)^{2} by using](https://cdn.numerade.com/previews/d66a72c4-586f-4529-aab8-30324ee75fa3.gif)