Warm-up Tuesday 10/27/20 Subtracting Integers

Warm-up Tuesday 10/27/20 Subtracting Integers

Multiple Choice

Last week, we added integers. -5 + 3 = ?

• 8

• -8

• 2

• -2

Multiple Choice

This week, we are subtracting, which we change to addition. "Add a line and change the sign."

When we change the problem 8 - 10 = ?, it becomes_________

• 8+ 10= 18

• 8 + -10 = -2

For 8-10=

1) First number stays the same.

2) Add a line (change to addition)

3) Change the sign of the second number to its opposite. 10 becomes -10.

4) Add using the rules from last week, or number line

So 8 + -10 = -2 the signs are different, so find their difference and keep it negative.

Multiple Choice

-4 - 6 = ?

• -4 + 6 = 2

• -4 + -6 = -10

Multiple Choice

5 - (-3) = ?

• 5 + (-3) = 2

• 5 + 3 = 8

Multiple Choice

-7 - (-12) = ?

• -7 + 12 = 5

• -7 + -12 = -19