Rounding to the nearest million
Today I can round seven-digit numbers to the nearest million using the critical digit.
A Look back3 min
- 1.
Write < or > in the box: 4,000,000 3,900,000
- 2.
How many 100,000s make 1,000,000?
- 3.
Write 5 million in digits.
B Watch me, then you4 min
In a made-up town, 6,740,000 tickets were sold. Round this to the nearest million.
The two nearest millions are 6,000,000 and 7,000,000.
The midpoint between them is 6,500,000.
The critical digit is 7, so 6,740,000 is past the midpoint.
Round up to 7,000,000.
- 1.
Round 2,850,000 to the nearest million.
C Your turn5 min
- 1.
Round 7,150,000 to the nearest million. Circle the answer.
8,000,0007,000,000 - 2.
Round 7,350,000 to the nearest million. Circle the answer.
8,000,0007,000,000 - 3.
Round 7,550,000 to the nearest million. Circle the answer.
7,000,0008,000,000 - 4.
Round 7,950,000 to the nearest million. Circle the answer.
8,000,0007,000,000
Say it out loud: Which digit changed in each row? Did the rounded answer change every time, and why?
D Spot the mistake3 min
- 1.
What is 4,650,000 to the nearest million?
E Think deeper3 min
- 1.
Mia's number rounds to 6,000,000 to the nearest million. What is the smallest number it could be?