Scenario: Banking & Temperature - Learn multiplication and division rules through financial and temperature scenarios!
A bank account has a monthly overdraft fee of $150. If this fee is charged for 6 months, what is the total change in the account balance?
Calculation: -150 × 6 = -900 dollars
The account balance decreases by $900 over 6 months.
Positive × Positive = Positive
Negative × Negative = Positive
Examples: 3 × 4 = 12, (-3) × (-4) = 12
Positive × Negative = Negative
Negative × Positive = Negative
Examples: 3 × (-4) = -12, (-3) × 4 = -12
Over 5 days, the temperature drops by 10°C. What is the average daily temperature change?
Calculation: -10 ÷ 5 = -2°C per day
The temperature drops an average of 2°C each day.
Positive ÷ Positive = Positive
Negative ÷ Negative = Positive
Examples: 12 ÷ 3 = 4, (-12) ÷ (-3) = 4
Positive ÷ Negative = Negative
Negative ÷ Positive = Negative
Examples: 12 ÷ (-3) = -4, (-12) ÷ 3 = -4
Key Rule: Count the number of negative signs in the multiplication.
(-3) × (-4) × (-2) × (-1) = 24
4 negatives → positive
(-3) × (-4) × (-2) = -24
3 negatives → negative
Calculate: (-8) × 5 = ?
Your solution:
Calculate: (-24) ÷ (-6) = ?
Your solution:
Calculate: (-2) × (-3) × (-4) = ?
Your solution:
A stock loses $3 per day for 7 days. What is the total change in value?
Your calculation: