Question

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EXERCISE 1.1
Using appropriate properties find.
2 3 5 3 1
(1)
3 5 2 5 6
Х
+
-​

Answer 1

Answer:

$- 2 \div 3 \times 3 \div 5 + 5 \div 2 - 3 \div 5 \times 1 \div 6 \\ = \frac{ - 2}{3} \times \frac{3}{5} + \frac{5}{2} - \frac{3}{5} \times \frac{1}{6} \\ = (( \frac{ - 2}{3} \times \frac{3}{5} ) + \frac{5}{2}) - ( \frac{3}{5} \times \frac{1}{6} ) \\ = \frac{ - 2}{5} + \frac{5}{2} - \frac{1}{10} \\ = \frac{ - 4 + 25 - 1}{10} \\ = \frac{20}{10} \\ = 2$