Find out how many ones, tens, hundreds and thousands are in all of a whole number.
Number Framework Stage 6.
Key Ideas
Check that the students understand that 10 one thousands equals one ten thousand not, as is commonly thought, one million.
Using Materials
Problem: “Work out $9,993 + $9.”
Record $9,993 + $9 on the board or modelling book. With play money, model $9,993 and $9. Discuss why the 12 single dollars must be swapped for a ten-dollar note and two single dollar notes. Discuss why nine tens plus the extra ten-dollar note makes 10 tens, which must be swapped for a one-hundred-dollar note. Continue these swaps until there is a single ten-thousand-dollar note and two single dollars. Record the answer of $10,002 on the board or modelling book.
Problem: “Work out $10,003 – $4.”
Record $10,003 – $4 on the board or modelling book. Using play money, break the $10,000 down to 10 one-thousand-dollar notes, break the one-thousand-dollar note down to 10 one-hundred-dollar notes, and so on until there are 13 single dollars.
Record the answer of $9,999 on the board or modelling book.Examples: Word stories and recording for: $9,988 + $19 $6 + $52,994, $116 + $9,884 $40,003 – $7 $20,000 – $100 $999 + $1,004 $1,001– $45 $50,003 – $5 ...
Using Number Properties
Examples: Word stories and recording for: 8 992 + 9 6 + 12 996 16 + 6 684 44 503 – 7 18 900 + 102 99 + 12 099 50 + 6 150 102 003 – 5 ...