What is 1,856 rounded to the nearest 10?
1,850
1,860
1,900
What is 1,856 rounded to the nearest 100?
1,800
What is 3.14159265 rounded to 3 decimal places?
3.141
3.142
4.252
What is 3.14159265 rounded to one decimal place?
3.1
3.0
3.2
What is 467 rounded to one significant figure?
400
500
470
What is 0.53 rounded to one significant figure?
1
1.5
0.5
Estimate the answer to 47 × 84?
4,000
3,948
3,900
What is the estimate of (9.8 × 11.3) ÷ (2.57 + 2.09)?
23.76
21
20
The number 647 has been rounded to the nearest whole number. The upper and lower bounds are:
645 and 655
646.5 and 647.5
646 and 648
a = 30 (1 sf), b = 5 (nearest whole number). What is the upper bound of \(ab\)?
192.5
150
162.25