Which of these is NOT a non-standard unit? — Centimeter.Centimeter is a standard unit. Paperclips, crayons, and hand spans are non-standard!
A bookshelf is 20 coins long. What can you conclude? — The bookshelf is 20 of those coins wide.The bookshelf is 20 coins wide — we are using coins as a non-standard unit of length here.
A crayon is 6 paper clips long. Another crayon is 9 paper clips long. How many paper clips long are both crayons together? — 15.6 + 9 = 15 paper clips total for both crayons.
Why can't we leave gaps between units when measuring? — We would count air as part of the length.Gaps between units mean we are counting empty air — that gives us a number SMALLER than the real length!
Which measurement is likely WRONG because of gaps? Object: 10 blocks long. Measurements: A=10, B=8, C=11. — B (8, gaps left).B=8 is too small — likely caused by gaps between the blocks!
A ribbon is 14 cubes long. You have only 10 cubes. What could you do? — Use paperclips or another unit instead.Use a different non-standard unit like paperclips! We are not limited to just one type of unit.
If object A is 5 paper clips and object B is 5 erasers, can you say they are the same length? — No, paper clips and erasers are different sizes.Paper clips and erasers are different sizes, so 5 of one does not equal 5 of the other!
What is the purpose of measuring with non-standard units? — It helps us understand that measurement means comparing lengths.Non-standard measurement builds our understanding: length is how many equal-sized units fit end to end!
School starts at 8:00 and ends at 3:00. How many hours is that? — 7 hours.From 8:00 to 3:00 = 7 hours. Count: 9, 10, 11, 12, 1, 2, 3 — that is 7!
What comes right before 12:00? — 11:30.The half-hour just before 12:00 is 11:30!
The movie starts at 2:00. It is 1 hour long. What time does it end? — 3:00.2:00 + 1 hour = 3:00. The movie ends at 3:00!
What time is 1 hour before 9:30? — 8:30.9:30 − 1 hour = 8:30. The minute hand stays at 6, hour hand moves back 1.
True or False: 10:00 and 10:30 show the long hand in different positions. — True — 10:00 has long at 12, 10:30 has long at 6.True! At 10:00 the long hand is at 12; at 10:30 the long hand is at 6.
Ava records her jumps with tallies and makes 4 full groups with 2 extras. How many jumps total? — 22.4 groups of 5 = 20, plus 2 extras = 22 jumps.
You want to show 20 in a tally chart. How many full groups of 5 do you need? — 4.20 ÷ 5 = 4. You need 4 full groups of 5 to show 20!
A tally shows: |||| |||| |||| | = ___ — 16.5 + 5 + 5 + 1 = 16. Three full groups of 5 plus 1 extra!
Why is a tally chart useful for comparing data? — You can see which category has more or fewer marks quickly.A tally chart lets you instantly compare categories by looking at the number and size of groups of tallies!
Tom tallied 8 red apples, 6 green apples, and 5 yellow apples. What is the total? — 19.8 + 6 + 5 = 19 apples total.
Which tally is WRONG for the number 9? — ||||||||| (nine loose marks).9 single marks not grouped is technically possible but very hard to count — and could easily be misread. The correct method is 5 + 4!