Rounding 2-Digit Numbers to the Nearest Ten 3-23
Use an open number line and bar model to determine if a number is closer to the number of tens it has, or 1 more ten. What's 23 rounded to the nearest ten? The nearest multiples of ten are 20 and 30 – 2 tens and 3 tens. Halfway between 20 and 30 is 25. Since 23 is less than 25, it's closer to 2 tens. Round down to 20.
