Questions sometimes Revision
1. Write down the numbers that are integers in this list of numbers. $$17,35 ;-3561234 ; 55598 ; \frac{7}{8} ; 0,135 ;-\frac{1}{2} ; \sqrt{36}$$
2. Use the inequality signs < or $>$ in place of $\square$ to compare these numbers. a) $-12050 \square-22510$ b) $135050 \square 135500$
3. Arrange these numbers in ascending order. $$132 ; 1500 ;-289 ;-143576 ; 1906 ;-257 ; 81$$
4. Arrange these numbers in descending orger $$21913 ;-2271 ; 6105 ;-110 ; 128 ; 0 ; 493 ; 892$$
5. Write down the additive inverses of these numbers. a) -60 b) 18
6. Simplify. a) $1250-(-300)+(-120)$ b) $81-19+218-412$ c) $-4235+176-(-3285)$
7. a) By how much is 18 greater than -8 ? b) By how much is -20 less than 20? c) What must be added to -16 to give 45 ? d) What must be added to 25 to give -30 ? e) What is the difference between -12 and 12?
8. Calculate. a) $-114 \times 15$ b) $(-105) \div(-15)$ c) $-48 \div(-6)$ d) $1000000 \div-250$
9. Simplify. a) $(-3)(-2)(-4)(-1)$ b) $(-6)(-2)(5)(-3)$
10. Kate's bank statement shows a balance of -R468. How much does she need to deposit into her bank account to get her balance to R100?
11. The temperature was recorded at $5^{\circ} \mathrm{C}$ on Sunday. The next day it dropped by $12^{\circ} \mathrm{C}$. What was the temperature the next day?
12. Which temperature is lower? a) $8^{\circ} \mathrm{C}$ or $-4^{\circ} \mathrm{C}$ b) $-12^{\circ} \mathrm{C}$ or $-15^{\circ} \mathrm{C}$