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Mixed negatives

Stuck? Read the notes

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Find the answer to all the following calculations, without a calcutator:

1. 98 \div (-14)
2. (-10) \times (-17)
3. (-9) + 4
4. (-6) + 16
5. 324 \div (-18)
6. (-17) + (-9)
7. (-5) - (-11)
8. (-11) - 8
9. 19 \times (-13)
10. (-13) \times 12
11. 240 \div (-15)
12. (-15) + (-6)
13. 4 - (-5)
14. (-120) \div 10

If b = -20,\ k = -4,\ m = 8 , evaluate the expressions below, without a calculator:

k + m

3k

b^{2}

b - m

3m - k

2b + 2k

kmb

\displaystyle{\frac{kb}{m}}