1. Simplify the following.
a) 18 + 4 x 6 ÷ 2 – 9
b) 17 x 3 + 81 ÷ 9 – 60
c) 5.3 + 6 x 0.05 – 2.1
d) 28.9 – 20.8 + 3.9
e) 108 ÷ 12 + 46 – 14
f) 1.8 x 2.4 – 2 x 2.1 + 0.12
g) 7 + 7 x 7 ÷ 7 – 7 + 7
h) 16 + 9 – 3 x 12 ÷ 6 – 5
i) 5.3 + 1.5 ÷ 5 x 2
j) 3 + 3 x 4 ÷ 2
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