Mia het 6 arbeiplantjies in haar tuin. Elke plantjie het 7 ryp arbeie aan. Sy benodig 40 arbeie vir haar Aarbeimousse-nagereg. Het sy genoeg arbeie?

$$
6 \text{ plantjies} \times 7 \text{ aarbeie/plantjie} = 42 \text{ aarbeie}
$$

Mia has 42 strawberries and needs 40. Since $42 > 40$, she has enough.
*   $\boxed{\text{Ja, sy het genoeg aarbeie}}$

$$
4 \text{ ritte} \times 12 \text{ mense/rit} = 48 \text{ mense}
$$

There are 50 Grade 3s, but the bus can only transport 48 people in four trips. Since $48 < 50$, four trips are not enough.
*   $\boxed{\text{Nee, vier ritte is nie genoeg nie}}$

$$
\text{R}12/\text{kg} \times 4\text{ kg} = \text{R}48
$$
*   $\boxed{\text{R48}}$