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Here are some tips for Integer Subtraction, which aligns with Texas state standards:

Integer Subtraction

This topic covers the subtraction of positive and negative numbers.
Subtraction is the opposite of addition. Their movement on the number line is also the opposite.

Positive - Positive

3 - 5

a.	Start at +3 on the number line
b.	From +3, move 5 to the left to subtract +5
	You end up at -2

3 - 5 = ^-2

Notice that 3 - 5   =   3 + ^-5

Positive - Negative

1 - ^-2

a.	Start at +1 on the number line
b.	From +1, move 2 to the right to subtract -2
	You end up at +3

1 - ^-2 = 3

Notice that 1 - ^-2   =   1 + 2

Negative - Positive

^-1 - 3

a.	Start at -1 on the number line
b.	From -1, move 3 to the left to subtract +3
	You end up at -4

^-1 - 3 = ^-4

Notice that ^-1 - 3   =   ^-1 + ^-3

Negative - Negative

^-3 - ^-4

a.	Start at -3 on the number line
b.	From -3, move 4 to the right to subtract -4
	You end up at +1

^-3 - ^-4 = 1

Notice that ^-3 - ^-4   =   ^-3 + 4

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