How to round numbers | Year 3 Mathematics PDF Download

Rounding to the nearest 10

• To round a number to the nearest 10, focus on the units digit.
• If the units digit is 5 or higher, round up. If it's 4 or lower, round down.
• The last digit in 356 is 6, so we round it up to 360.
  • 356 becomes 360.
• The last digit of 352 is 2, so we round it down to 350.
  • 352 becomes 350.
• 475 ends in a 5, which means we always round up. So, 475 rounds up to 480.
  • 475 becomes 480.

Rounding to the Nearest 100

• To round a number to the nearest 100, focus on the tens digit.
• If the tens digit is 5 or higher, round up. If it's 4 or lower, round down.
• The tens digit in 3281 is 8, so we round it up to 3300.
  • 3281 becomes 3300.
• The tens digit of 3216 is 1, so we round it down to 3200.
  • 3216 becomes 3200.

Rounding to the nearest 1000

• To round a number to the nearest 1000, focus on the hundreds digit.
• If the hundreds digit is 5 or higher, round up. If it's 4 or lower, round down.
• The hundreds digit in 4559 is 5, so we round it up to 5000.
  • 4559 becomes 5000.
• The hundreds digit of 4295 is 2, so we round it down to 4000.
  • 4295 becomes 4000.