9th and 11th one answer
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Step-by-step explanation:
Q9
(i) 1+2/3
=3+2/3
=5/3
(ii) 3-12/5
=15-12/5
=3/5
Q11
(i) -6+(-15)+5+17
opening brackets
-6-15+5+17
-21+22
=1
(ii) 30+(-30)+(-88)+(80)
opening brackets
30-30-88+80
0-88+80
=-8
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