3.4 Lower and upper bounds

The distance from Tokyo to Melbourne is 8000 km when rounded to 1 significant figure.

Write down the upper and lower bounds of the possible distance between the cities.

A number is rounded to 2 significant figures, and the answer is 4200. 

Write down the upper and lower bounds.

Salma’s height is measured as 164 cm to the nearest cm.

Write an inequality to show the range of the possible values of the height.

A decimal number is rounded to the nearest ten.

Write down the inequality to show the range of values that the number can be

when the answer is 40.

A decimal number is rounded to the nearest ten.

Write down the inequality to show the range of values that the number can be

when the answer is 810.

A decimal number is rounded to the nearest hundred.

Write down the inequality to show the range of values that the number can be

when the answer is 2300.

A number is rounded to 2 significant figures.

Write down the inequality to show the range of values that the number can be

when the answer is 32 000.

A number is rounded to 3 significant figures.

Write down the inequality to show the range of values that the number can be

when the answer is 87 400.