2 Fill in the correct relationship sign ( < , > or = ): 0,72 ______ 0,720

The number 0,720 is equivalent to 0,72 because trailing zeros after the decimal point do not change the value of the number.

Align the numbers by their decimal points and subtract column by column, starting from the right.

  84.637
- 46.254
--------
  38.383

Divide 64,8 by 6:

• 6 goes into 6 once ($1 \times 6 = 6$).
• Bring down 4. 6 goes into 4 zero times ($0 \times 6 = 0$).
• Place the decimal point in the quotient.
• Bring down 8. 6 goes into 48 eight times ($8 \times 6 = 48$).

• 3.5.1 How much does he earn per day? Thabo earns R 47,50 per hour and works 8 hours per day.

  $$\text{Daily earnings} = \text{Hourly rate} \times \text{Hours per day}$$ $$\text{Daily earnings} = \text{R }47,50 \times 8 = \text{R }380,00$$

  Thabo earns $\boxed{\text{R }380,00}$ per day.

• 3.5.2 How much does he earn per week? Thabo works 5 days per week.

  $$\text{Weekly earnings} = \text{Daily earnings} \times \text{Days per week}$$ $$\text{Weekly earnings} = \text{R }380,00 \times 5 = \text{R }1900,00$$

  Thabo earns $\boxed{\text{R }1900,00}$ per week.

• 4.1.1 Calculate $4^3$.

  $$4^3 = 4 \times 4 \times 4 = 16 \times 4 = 64$$ $$4^3 = \boxed{64}$$

• 4.1.2 Calculate $\sqrt[3]{125} + \sqrt{49}$. First, find the cube root of 125: $5 \times 5 \times 5 = 125$, so $\sqrt[3]{125} = 5$. Next, find the square root of 49: $7 \times 7 = 49$, so $\sqrt{49} = 7$. Now, add the results:

  $$\sqrt[3]{125} + \sqrt{49} = 5 + 7 = 12$$ $$\sqrt[3]{125} + \sqrt{49} = \boxed{12}$$

The expression is $7 \times 7 \times 7 \times 5 \times 5$.
The number 7 is multiplied by itself 3 times, so it can be written as $7^3$.
The number 5 is multiplied by itself 2 times, so it can be written as $5^2$.

The given numbers are $-5; +6; -3; +9; 0; -7$.
Descending order means from largest to smallest.
The largest number is $+9$.
The next largest is $+6$.
Then 0.
Then the negative numbers, from largest (closest to zero) to smallest (furthest from zero): $-3$, then $-5$, then $-7$.