Integer Operations
Adding Signed Numbers
–3 + (–1) =
–3 × (–1) =
Same sign: add the
absolute value of the
numbers. Keep the sign.
–4 + (–5) =
–4 × (2) =
6 + (–10) =
7 • (–3) =
–16 + (+5) =
–2 • (+4) =
–4 + (–2) + (+6) =
–4(–2) + 3(–2) =
Subtracting Signed
Numbers
–5 – (–4) =
–30 ÷ (–6) =
To subtract signed
numbers, add the opposite.
–1 – (–35) =
44 ÷ 4 =
- Keep the first number
- Change the subtraction
10 – (–8) =
6 ÷ (–12) =
–20 – (+19) =
–12 ÷ (+6) =
Different signs: subtract
the absolute value of the
numbers. Use the sign of
the number with the
greater absolute value.
-
sign to addition
Change the sign of the
second number
Follow rules for adding
signed numbers
Multiplying Signed
Numbers
(+) • (+) = +
(–) • (–) = +
(+) • (–) = –
(–) • (+) = –
Dividing Signed
Numbers
(+) ÷ (+) = +
(–) ÷ (–) = +
(+) ÷ (–) = –
(–) ÷ (+) = –
glue this part down
Add
+
Multiply
×
"
"
glue this part down
"
Divide
÷
"
Subtract
–
Integer Operations
Adding Signed Numbers
Same sign: add the
absolute value of the
numbers. Keep the sign.
Different signs: subtract
the absolute value of the
numbers. Use the sign of
the number with the
greater absolute value.
Subtracting Signed
Numbers
–3 + (–1) =
-4
–3 × (–1) =
3
–4 + (–5) =
-9
–4 × (2) =
-8
-8
6 + (–10) =
-4
7 • (–3) =
-21
–16 + (+5) = -11
–2 • (+4) =
-8
–4 + (–2) + (+6) = 0
–5 – (–4) =
-1
To subtract signed
numbers, add the opposite.
–1 – (–35) = 34
- Keep the first number
- Change the subtraction
10 – (–8) =
-
sign to addition
Change the sign of the
second number
Follow rules for adding
signed numbers
18
–20 – (+19) = -39
–4(–2) + 3(–2) = 2
–30 ÷ (–6) = 5
44 ÷ 4 =
11
6 ÷ (–12) = -1/2
–12 ÷ (+6) = -2
Multiplying Signed
Numbers
(+) • (+) = +
(–) • (–) = +
(+) • (–) = –
(–) • (+) = –
Dividing Signed
Numbers
(+) ÷ (+) = +
(–) ÷ (–) = +
(+) ÷ (–) = –
(–) ÷ (+) = –