Rounding to nearest 10

Rounding helps us count easily in tens and hundreds. Rounding If Bartosh has 7 toy cars, he might say “I have almost 10 cars”, because 7 is close to 10.

Counting in tens is easy. Try this number line: Complete these number sentences: = = 20 – 10 = 90 – 40 = 110 – 20 = = Rounding tens

These numbers round down These numbers round up What would we round 7 to? How do we know what to round to? Rounding tens 10

What would we round 73 to? What would we round 37 to? What would we round 55 to? Rounding tens

What are the smallest and largest numbers that you could round to 40? There is always a difference of 9 between the smallest and the largest. Smallest possibleRounded numberLargest possible Rounding tens

Round these numbers to the nearest ten Rounding tens 30