Photo AI
7 (a) Round 81.469 to 1 decimal place - OCR - GCSE Maths - Question 7 - 2018 - Paper 1
Question 7
7 (a) Round 81.469 to 1 decimal place. (b) Round 0.005 694 to 3 significant figures.
Worked Solution & Example Answer:7 (a) Round 81.469 to 1 decimal place - OCR - GCSE Maths - Question 7 - 2018 - Paper 1
Step 1
Round 81.469 to 1 decimal place.
Answer
To round the number 81.469 to 1 decimal place, we look at the tenths and hundredths places. The tenths place is 4, and the hundredths place is 6. Since 6 is greater than or equal to 5, we round the 4 up by 1. Hence, 81.469 rounded to 1 decimal place is 81.5.
Step 2
Round 0.005 694 to 3 significant figures.
Answer
To round 0.005 694 to 3 significant figures, we first identify the significant digits. The first three significant figures of 0.005 694 are 5, 6, and 9. Looking at the fourth digit (4), since it is less than 5, we do not round up. Therefore, the answer is 0.00569.