10 minutes, then stopCostume 2 + correctionsSun 4 October1 / 4
Choose one of these two
1 FPS 2 food — do sheet 1 or sheet 2, then everyone does 3 and 4
Name Date
1 · FPS — kill/death ratioK/D ratio = kills ÷ deaths: how many kills for each time you were knocked out.
With big numbers, a rough estimate first is quicker.
1Kills 42, deaths 6. What is the K/D ratio?
2Kills 79, deaths 4. Round the kills to the nearest ten and estimate the K/D ratio.
3Kills over a week: 18, 23, 31, 27, 12. Round each to the nearest ten and estimate the total.
2 · Food — the price of onePrice of one = total price ÷ number of pieces.
When a price is awkward, like 298 yen, round it first and then divide.
1Doughnuts: 6 for 300 yen. How much is one?
2Rice balls: 8 for 396 yen. Round 396 to the nearest hundred and estimate the price of one.
3Biscuits: A is 5 for 298 yen, B is 9 for 452 yen. Round the prices to the nearest ten and estimate which is cheaper per biscuit.
3 · From here, everyone
4Round 7,648 to the nearest hundred.
5Write every whole number that rounds to 50 (nearest ten).
6You buy 38 packs of gum at 52 yen each. Round both, keeping only the first digit, and estimate the cost.
4 · Corrections, and one puzzle problem
7Pick one from the corrections notebook and do it again.
Once you can do it the second time, that question is finished.
8Tree planting — trees go along a straight 30 m path, every 5 m from one end to the other, including both ends. How many trees?
Draw it and count the trees one by one.
9Friday's trap once more: round 3,450 to the nearest thousand.