20 minutes, then stopCostume 2 + correctionsSun 11 October1 / 4
Choose one of these two
1 Geography 2 Basketball — do sheet 1 or sheet 2, then everyone does 3 and 4
Name Date
1 · Geography — comparing populationsBig populations are easier to compare as rounded numbers.
Made up. The prefectures and their populations are all invented.
| Prefecture | Population |
|---|
| Sunnyside | 312,486 |
| Bluesky | 1,873,540 |
| Moonfield | 905,718 |
| Seabreeze | 1,246,093 |
Four made-up prefectures1Round the population of Sunnyside, keeping the first 2 digits.
Look at the 3rd digit from the left.
2Round Bluesky and Seabreeze, keeping the first 2 digits each. Which is bigger, and by about how many?
3About how many times bigger is Bluesky than Sunnyside? Round both keeping 2 digits, treat 10,000 as one unit, and divide.
1,900,000 is 190 ten-thousands, 310,000 is 31. So 190 ÷ 31.
2 · Basketball — per gamePer game = total ÷ number of games. A free throw is 1 point, a three-pointer is 3 points.
On Wednesday it was "one in how many". Today it is "how many per game".
1A team made 108 free throws in 12 games. How many per game?
12 → 10. Will the answer be a bit under 10?
2A team made 252 three-pointers in 28 games. How many per game?
28 → 30. Try 240 ÷ 30 = 8, multiply and subtract.
3Making 252 three-pointers is how many points in all? First treat 252 as 250 to estimate, then work out the exact points.
3 · From here, everyone
4Work out 345 ÷ 48 with long division.
48 → 50. Start from 350 ÷ 50 = 7.
5Of the whole numbers that round to 8,000 (nearest thousand), write the smallest and the largest.
On a number line, left and right of 8,000.
6A book has 215 pages. You read 32 pages a day. In how many days do you finish it?
4 · Corrections, and one puzzle problem
7Pick one question you got wrong this week from your notebook and do it again.
1 Which day and number? 2 Your answer and the right one 3 Where did it go wrong? 4 Redo it
Once you can do it the second time, that question is finished.
8Sum and difference — Two people have 70 stickers together. A has 12 more than B. How many does each have?
Draw a bar diagram first. How do you make A's bar the same length as B's?
9A "the first digits will not go" problem, like Tuesday's. Work out 288 ÷ 36 with long division.
28 is smaller than 36. Take 288 as one lump.