Solve addition and subtraction problems by using place value.
Number Framework Stage 5
Using Materials
Problem: Mrs Jones takes her class to the circus. She has $237 to pay for the students to get in. Admission is $10 per person. She has 25 in her class. Does she have enough money?
The students solve the problem in groups with play money. Write 237 on the board and discuss the 2 - ask how many tens this is worth. Then ask how many tens needed altogether. And answer the question - there is not enough money.
Examples. Word stories and recording for: $167 for 13 students, $203 for 41 students, $203 for 21 students, $199 for 18 students, $167 for 17 students….
Problem: Mrs Jones collects $10 from each of her class to go to the zoo. She collects from 17 students. How much money has she got?
Examples. Word stories and recording for: 15 ten dollar notes, 26 ten dollar notes, 13 ten dollar notes, 21 ten dollar notes….
Using Imaging
Shielding and Imaging Only: Examples. Word stories and recording for:
12 ten-dollar notes 29 ten-dollar notes 19 ten-dollar notes
31 ten-dollar notes 34 ten-dollar notes 45 ten-dollar notes
Using Number Properties
Problem: Boxes of chocolates cost $10 each. How many boxes can Charlotte buy if she has $589 to spend? Discuss the solution. Examples. Repeat for: $867, $701, $327, $991, $563….