Number Line Addition and Subtraction

2.2 and 5.1

Remember to silence your cell phone and put it in your bag.

Whole Number Addition

a + b = ?Start at 0, facing the positive direction.Move forward a.Move forward b.

Whole Number Subtraction

a – b = ?Start at 0, facing the positive direction.Move forward a.Turn around.Move forward b.

Integer Addition

a + b = ?Start at 0, facing the positive direction.If a>0, move forward a. If a<0, move backward |a|.If b>0, move forward b. If b<0, move backward |b|.

Integer Subtraction

a – b = ?Start at 0, facing the positive direction.If a>0, move forward a. If a<0, move backward |a|.Turn around.If b>0, move forward b. If b<0, move backward |b|.

Modeling Integer Operations

I do not have to model integer operations the same way Dr.

Simons does,BUT

I must get my model approved prior to Test 1.