Week of September 12

 Grade 9 Math

UNIT 3 CLASSWORK

3.1 questions 6, 7, 8, 9, 10, 12, 13, 16, 18, 20, 22
3.2 questions 3, 4, 5, 7, 8, 10, 11, 12, 13, 15
3.3 questions 3, 5, 7, 8, 9, 10, 11, 13

There will be a mid-unit quiz next week.   Classwork will be collected.

Try this for fun:

Rational Numbers Oasis

Twenty caravans are traveling across the desert one day apart. The first caravan reached an oasis, and the camels drank half of the water in the pool. On the second day, the second caravan reached the oasis, and the camels drank one-third of the water that was left. On the third day, the camels in the third caravan drank one-quarter of the water that was left. On the first day, the pool contained 1050 m3 of water. How much was left after the 20th caravan passed through?

Click here for a hint

Click here for the solution

Note: Brain teasers are often open to more than one interpretation, and multiple answers may be possible. Sample solutions are shown.

Grade 8 Math

UNIT 2 CLASSWORK

2.1 questions 5-15
2.2 questions 3-11, 13, 15, 18
2.3 questions 3, 4, 5, 6, 8, 10, 11, 14, 16

Try this for fun:

Convenience Store

Marlon went to a convenience store and selected a package of granola bars for $3.16. He then added three other tax-free items to his basket. The total of all four items was $7.11. The clerk used a calculator to determine the total to be $7.11 also. Later, when Marlon checked the receipt, he noticed that the clerk had multiplied, rather than added, the four prices. What were the four prices?



Click here for a hint

Click here for the solution

Note: Brain teasers are often open to more than one interpretation, and multiple answers may be possible. Sample solutions are shown.