3. Estimate your answer by rounding off to the nearest 10 and
then calculate.
a. 28 x 30
b. 16 x 40
c. 37 × 50
4. Calculate by using the method you like best.
a. 27 x 15
b. 31 x 17
c. 26 × 15
26 children in a class. Each child pays R20 for a new
book. How much did they pay altogether?