3nbt1 Worksheets

3nbt1

• Practice rounding numbers to make multiplication problems easier to do in your head.
• Estimate a product by multiplying the rounded numbers.
• Use compatible numbers (easy-to-multiply numbers) to get a quick estimate.
• Choose the best estimate when there are several possible answers.

3nbt1

• Figure out which numbers could round to a given number at a certain place value.
• Use place value to decide the cutoff point where a number rounds up or rounds down.
• Find the smallest and largest numbers that would round to the same result.

3nbt1

• Round a number to the nearest hundred by deciding which hundred it is closest to.
• Use a number line to see where a number falls between two hundreds.
• Find the midpoint between two hundreds and use it to choose which way to round.

3nbt1

• Round a whole number to the nearest ten.
• Use a number line to see which two tens a number falls between.
• Decide which ten is closer by comparing the distance on the number line.
• Handle halfway cases (numbers ending in 5) by rounding up to the next ten.

3nbt1

• Round whole numbers to the nearest ten or hundred.
• Use the ones and tens digits to decide whether to round up or down.