A hall has 23 rows of chairs with 18 chairs in each row. 400 people have booked for a talk.
Are there enough chairs? Show your working.
Practice
Written methods and checks
The lesson: Written methods and quick checks
A warehouse receives 36 boxes of light bulbs. Each box holds 48 bulbs.
How many bulbs is that altogether?
Twelve friends share a restaurant bill of £276 equally.
How much does each person pay?
A builder needs 49 bags of sand at £21 a bag. He wants a quick estimate of the cost before ordering.
Which is the best estimate?
148 staff are going to a training day. Each minibus carries 16 passengers.
How many minibuses are needed?
A clerk adds two delivery totals, 3,846 and 2,975, and writes 5,821.
Use an estimate to check the clerk's total. What is the correct total?
A walking club books a coach trip for 52 members at £17 each.
How much does the club collect?
A bathroom needs 2,000 small mosaic tiles. They are sold in boxes of 24.
How many boxes must be bought?
A cleaner earns £86 for each shift. She works 7 shifts this fortnight.
How much does she earn?
A shop has 1,250 bags of compost. It sells 85 bags a day.
How many bags are left after 12 days?
A shop receives 18 boxes. Each box contains 24 notebooks. It sells 37 notebooks.
How many notebooks are left?