CPM Homework Banner

Home > CCA > Chapter A > Lesson A.1.3 > Problem A-33


Without a calculator, compute the value of each expression below.

Compute without a calculator

  1. Use the Commutative Property of Addition and your understanding of minus signs to make this a subtraction problem.

  1. When you multiply two numbers with the same sign, you will always get a positive result.

  1. Change the subtraction into an addition of the

  1. −30

  1. Simplify before multiplying

  1. Multiply from left to right, finding the correct sign for each step before moving on.

  1. −12

  1. Division uses the same rules
    for signs as multiplication.