A shop made £397,450 in sales. Round this amount to the nearest £10,000.

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20. A shop made £397,450 in sales. Round this amount to the nearest £10,000.

Identify the digit in the thousands place.
The number is £397,450. The digit in the thousands place is 7.
Round based on the thousands digit.
Since 7 is 5 or greater, we round up the digit in the ten thousands place. The ten thousands digit is 9. Rounding 9 up means it becomes 0, and the hundred thousands digit increases by 1.
So, £397,450 rounded to the nearest £10,000 is £400,000.

The rounded amount is $\boxed{\text{£400,000}}$ .

21. Calculate: $45,678 + 23,451 =$
Add the two numbers.
$45,678 + 23,451 = 69,129$
The sum is 69,129.
Comparing this to the options:
A. 68,129
B. 69,129
C. 69,119
D. 68,119

The correct option is B.
The answer is $\boxed{69,129}$ .

22. Calculate: $607,845 + 89,376 =$
Add the two numbers.
$607,845 + 89,376 = 697,221$
The sum is 697,221.
Comparing this to the options:
A. 697,121
B. 697,221
C. 696,221
D. 698,221

The correct option is B.
The answer is $\boxed{697,221}$ .

23. Calculate: $900,000 - 456,789 =$
Subtract the second number from the first number.
$900,000 - 456,789 = 443,211$
The difference is 443,211.
Comparing this to the options:
A. 443,211
B. 444,211
C. 453,211
D. 443,221

The correct option is A.
The answer is $\boxed{443,211}$ .

Answer