___________
Maths
Estimation and rounding
Starter quiz
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Significant figures are the digits in a number that contribute to the
______
of the number.
'accuracy' ✓
Select all the numbers which have 6 as the first significant figure.
46
68 ✓
606 ✓
46 266
600 606 ✓
In the number 45 026, in which column is the first significant figure?
tens
hundreds
thousands
ten thousands ✓
hundred thousands
Match each number to its value when it is rounded to one significant figure.
356 268
⇔
four hundred thousand ✓
42.689
⇔
forty ✓
449.09
⇔
four hundred ✓
3 591 054
⇔
four million ✓
3560
⇔
four thousand ✓
Round 85 026 to one significant figure.
'90 000' ✓
What value could the missing digit be in 5
\square
265 = 50 000 (to 1 s.f.)?
7
6
5
4 ✓
3 ✓
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