Answer: 1. a) (-6)(-2) = 12(-2) = -24(-1) = 24
b)
=
=8
c) (-5) + (-6) = -5 - 6= -11
2. a) +10°C
b) -6m
c) -100m
d) +5000
3. a) 56-2(20+12÷4x3-2x2) + 10
=> 56 - 2[(20) +(12÷4)3 - (2x2)] + 10
=> 56 - 2[(20) + 3(3) - (2x2)] + 10
=> 56 - 2[20 + 9 - 4] + 10
=> 56 - 50 + 10
=> 16
b) 3 + 6(5+4) ÷ 3 - 7
=> 3 + 6(9) ÷ 3 -7
=> 3 + 54 ÷ 3 -7
=> 3 + 18 - 7
=> 14
c) 2[2 + 2[39 - 2(17 + 2)]]
=> 2[4[39 - 2(19)]]
=> 2[4[37(19)]]
=> 2[2812]
=> 5624
4. a)
b) 45
c) 13
e) 2
f) 2
g) 31

5. a) 19
b) 45
c) 13
[On PNG]
6. 1) .01336 2) 44.363 3) .57366 4) 76.23 5) .001612 6) 3.70538
[2. I wasn't so sure about]