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Help me pls I have a test tomorrow

Help me pls I have a test tomorrow-example-1
User Aaronlevin
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12. Multiply by the reciprocal of 3/4 which is 4/3. 9/10x4/3 and multiply from there, simply to 6/5
15. 25/9 (same process)
18. 3/4
User Eloy Pineda
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