Maths Jotter notes

• What is the result of the expression (-5) - 5525?

  • 5530
• What is the sum of 2 and 5?

  7
• How is the expression \( 7m \) simplified when \( m = 2 \)?

  It simplifies to \( 14 \).
• What is the value of \( n^3 \) when \( n = 5 \)?

  125
• What is the result of the expression \( 2 \times 5 \times -3 \)?

  • 30
• What is the expression for \( (mn)^2 \) when \( m = 2 \) and \( n = 5 \)?

  100
• What is the area of a rectangle with dimensions 10 cm and 7 cm?

  70 cm²
• What is the formula for the area of a trapezium?


  \( A = \frac{1}{2} (a + b) h \)
• How do you find the area of a hexagon?


  By splitting it into equilateral triangles.
• What is the exterior angle of a regular hexagon?

  60°
• What is the sum of the interior angles of a polygon with \( n \) sides?

  \( (n-2) \times 180° \)
• How do you calculate the interior angle of a regular polygon?


  By using the formula \( \frac{(n-2) \times 180°}{n} \)
• What is the area of a trapezium with bases 10 cm and 20 cm, and height 5 cm?

  75 cm²
• What is the formula for the area of a rectangle?

  Area = length × width
• If the dimensions of a rectangle are doubled, how does the area change?

  The area becomes four times larger.
• How do you simplify the expression \( 3(x + 2) \)?

  It simplifies to \( 3x + 6 \).
• What is the result of \( 6 \times 8 \)?

  48
• What is the result of \( 3 \times (-2) \)?

  • 6
• What is the result of \( (-3) \times (-5)^3 \)?

  375
• What is the result of \( 5 - 7 - 9 \)?

  • 11
• What is the result of \( 14 - (-5) \)?

  19
• What is the result of \( 3 \times (-4) \times (-2) \)?

  24
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36
• What is the result of \( 14 - (-10) - 15 \)?

  9
• How do you simplify the expression \( 2x + 3x - 5x \)?

  It simplifies to \( 0 \).
• What is the result of \( 3 \times (-2) \times 6 \)?

  • 36
• What is the result of \( 5 - 5 - 7 - (-8) \)?

  1
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36
• What is the result of \( 3 \times (-2) \times 6 \)?

  • 36
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36
• What is the result of \( 3 \times (-2) \times 6 \)?

  • 36
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36
• What is the result of \( 3 \times (-2) \times 6 \)?

  • 36
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36
• What is the result of \( 3 \times (-2) \times 6 \)?

  • 36
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36
• What is the result of \( 3 \times (-2) \times 6 \)?

  • 36
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36
• What is the result of \( 3 \times (-2) \times 6 \)?

  • 36
• What is the result of \( (-2) \times 3 \times 6 \)?

  • 36