National Mathematics Program Activity Adding Integers
- 1. θ ADDING INTEGERS Adding with like sign
- 2. Rules in Adding Integers with Like Signs To add two or more negative numbers, get the sum of their absolute values and prefix the minus sign. To add two or more positive numbers, get the sum of their absolute values.
- 3. Examples: 1) (-5) + (-4) = -9 2) (-6) + (-5) = -11 3) (-7) + (-3) = -10 1) 5 + 4 = 9 2) 6 + 5 = 11 3) 7 + 3 = 10
- 4. Identify the opposite, adjacent and hypotenuse of the right angled triangle. Label the Triangle Sides Use SOH CAH TOA to help you decide which ratio to use (sin, cos, tan). Choose your Ratio Applying the formula ADDING INTEGERS Adding with different sign
- 5. Rule in Adding Integers with Different Signs To add two numbers with different signs, get the difference of their absolute values and prefix the sign of the number having larger absolute value.
- 6. Examples : 1) 12 + (-3) = 9 2) (-5) + 6 = 1 3) 2 + (-5) = -3 4) 12 + (-8) =4 5) (-21) + 6 = -5 6) (-8) + 15 = 7
- 7. Choosing the Trigonometric Ratio Add the following integers using the rules. Students are not allowed to use calculator or any gadgets to compute. Direction:
- 8. A. Give the sum of the following. 1) (-5) + (-7) = 2) (-10) + 18 = 3) 9 + (-15) = 4) (-11) + 11 = 5) (-8) + (-9) = 6) 30 + 0 = 7) 7 + 8 = 8) -6 + (-8) = 9) 4 + (-21) = 10) -16 + 8 =
- 9. Calculate your answer B. Supply the missing number to make the statement true. 1) 8 + ___ = 5 2) -11 + __ = 8 3) 16 + (-9) = __ 4) 24 + __ = 17 5)28 + __ = -32 6) -50 + 50 = __ 7) 2 + (-20) = __ 8) __ + 15 = -20 9) 100 + __ = 10 10) 500 + (-100) = __
- 10. C. Give the sum of the following. 1) (-8) + (-17) + (-26) = 2) 10 + (-26) + 88 = 3) 7 + 8 + (-56) = 4) (-6) + (-9) + 50 = 5) (-5) + (-21) + (-29) = 6) (-26) + (-29) + (-42) = 7) 30 + (-39) + (-13) = 8) (-60) + 100 + (-40) = 9) (-68) + 30 + 150 = 10) 80 + (-10) + (-15) =