Name:    Try It Out -- Chapter 4, Lesson 2: Estimating Sums and Differences

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

1.

Lake Baikal in Russia is the world’s deepest lake having a depth of 1637 metres. The depth of Lake Tanganyika in Africa is 1439 metres. About how much deeper is Lake Baikal? Use estimation to solve the problem.

 a. 100 metres c. 200 metres b. 150 metres d. 250 metres

2.

Canada’s largest national park, Wood Buffalo National Park, is located in both Northern Alberta and the Northwest Territories. It has an area of 44 807 square kilometres. Canada’s oldest national park, Banff National Park, in Alberta has an area of 6 641square kilometres. Estimate how much greater Wood Buffalo National Park is than Banff National Park.

 a. 40 000 square kilometres c. 38 000 square kilometres b. 36 000 square kilometres d. 37 000 square kilometres

Jillian’s school will win an environmental award if over 6 000 kilograms of recycled materials is collected.  She posted the results.

3.

Estimate how many more kilograms of recycled materials students collected than was required to win the environmental award.

 a. 100 c. 1000 b. 500 d. 2000