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When we multiply numbers by 100, we do not simply add 00 to the end.
When the numbers are decimals, this rule does not work.
54.6 × 100 does not equal 54.600
When we multiply numbers by 100, each digit must move two places to the left.
When we look at the columns in a Th, H, T, O grid we notice that thousands are 100 times bigger than tens, hundreds are 100 times bigger than ones, tens are 100 times bigger than tenths etc...
e.g. Work out:
54.6 × 100 = 5460
Here is 54.6 in a decimal place value grid.
| 5 | 4 | . | 6 |
Answer:
Each digit moves two places to the left.
Remember to fill in that 0 in the ones column.
So 54.6 × 100 = 5460
