Decimal Operations
Operations with Decimals-Should be able to do WITHOUT a calculator. You will eventually be able to use a calculator, but you need to understand the basic process before depending on a calculator.
For addition, see video at https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-arith-operations/cc-5th-add-sub-decimals/v/adding-decimals-example-1
For subtraction, see video at https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-arith-operations/cc-5th-sub-decimals/v/subtracting-decimals-up-to-hundredths
For multiplication , see video at https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-arith-operations/cc-5th-multiplication/v/intro-to-multiplying-decimals
For division, see video at https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-arith-operations/cc-5th-dividing-decimals/e/dividing_decimals_1