1.05 Multiplication and division by 10 and 100
Are you ready?
Can you break a number into its parts, using place value?
Complete in the number expander for $18522$18522.
$18522$18522 $=$= $\editable{}$ ten thousands $\editable{}$ thousands $\editable{}$ hundreds $2$2 tens $2$2 ones Write $18522$18522 as a number sentence.
$\editable{}+\editable{}+\editable{}+20+2$+++20+2
Learn
The digits in our number tell us how many ones, tens, hundreds or thousands (or more!) we have. Remembering that each place is ten times larger than the place to its right can help us when we need to multiply or divide by $10$10.
Apply
Fill in the boxes with the missing numbers.
$4400\div\editable{}=44$4400÷=44
$44400\div\editable{}=444$44400÷=444
When we multiply by $10$10, the digits move to the left one place, and our number gets bigger. We need to put a zero placeholder in the ones place when we multiply by $10$10. When we divide by 10, our digits move to the right one place, and our number gets smaller.