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.
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 ...
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 ...
Printed from https://nzmaths.co.nz/resource/large-numbers-roll-over at 8:25pm on the 3rd May 2024