Three marks exercise problems II — task. Mathematics State Board, Class 7.

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1. Subtract \(-3ab - 8\) from \(3ab + 8\). Also, subtract \(3ab + 8\) from \(-3ab - 8\).

Answer:

\(-3ab - 8\) from \(3ab + 8 =\)

\(3ab + 8\) from \(-3ab - 8 =\)

2. Add: \(2a + b + 3c\) and \(a + \frac{1}{3}b + \frac{2}{5}c\)

Answer:

Solution \(=\)

i a + \frac{i}{i} b + \frac{i}{i} c

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13. Three marks exercise problems II