What’s the Nearest Ten?
Materials: set of numeral cards (0-9) or 2 number cubes
- Turn over 2 numeral cards (or roll 2 number cubes) to make a 2-digit number.
- Identify the tens that your number falls between. Record the tens and the
midpoint between them on a number line. - Plot your 2-digit number on the number line.
- Which ten is your number closer to? Justify your reasoning.
- Repeat five times.
- Describe any patterns you find to determine when to round to the lesser
ten or round to the next ten.
4 3
43 is between 40 and 50.
It would round to 40
because it is closer to 40
than 50.(^40434550)
Example: