February 18, 2020

7C
- PEE essay, Playground A or Playground B
- write down twelve advantages or disadvantages for each playground

BEDMAS      ×   ÷

(–11) + 27 – 52 × 2 + 39 ÷ 3 – (–5) + 13 + (–2)³

= (–11) + 27 – 52 × 2 + 39 ÷ 3 – (–5) + 13 + (-8)

= (–11) + 27 – 52 × 2 + 13 – (–5) + 13 + (-8)

= (–11) + 27 – 104 + 13 – (–5) + 13 + (-8) [only have addition and subtraction left]

= (–11) + 27 – 104 + 13 + 5 + 13 – 8 [left to right]

= 16 – 104 + 13 + 5 + 13 – 8

= –88 + 13 + 5 + 13 – 8

= –75 + 5 + 13 – 8

= –70 + 13 – 8

= –57 –8

= – 65

(–3)³ + 30 ÷ (–6) + 12 + 2² – 13 + 15 + (–5)²

=11

=

(–34) × (–17) – 19 + 8 + 3² – (–4)³ + 13 × (–2)

=614

=

22  – (–3)³ + 8 × 9 – 7² + (–18) ÷ 2

=63

=

÷       ×

(–41) + 13 – (­­–15) ÷ 2¹ + 19 – (–5)² + 44 × (–2)³

= –378.5

=

(–3)³ + 1⁹⁹ – (–19) × 2¹ + (–3)² × 2² + 26 ÷ (–13)

= 46

=

(–4)² + (–17) – 7² + 2 × 5 – (–2)⁵ ÷ 16 + (–3)²

= –29

=

54  – (–3)² × 2³ + (–19) – 21 + (–88) ÷ (–2)²

= –102

=