Tiêu đề Y3 Maths 3012c NR3002b - 2025 Week 13 Notes.pdf ✅

1 Mathematics Year 3 Practice 3012c NR 3002
2 The Learning focus of Practice 12 is Adding and Subtracting 1, 2 and 3, Checking Calculations, Rounding and Time Yourself Test Page 2 Adding and Subtracting 1 Question 1 When solving these types of questions, it is always useful to use inverse operations to find the missing addend. If one addend and the sum are given, take the addend and subtract it from the sum. This will give you the missing addend. Don't forget to always check your work by adding together the two addends to make sure they equal the sum. For example: lets solve 1d together. Use inverse operations. 100-33=67 Question 2 Using units of measurement and finding the difference of the lengths of the scarves from 100 cm or 1 metre. For example: if my scarf was 62cm the difference would be 38cm. To solve this question, we are allowed to use numbers more than once, for example: numbers with a difference of 40 are 90 and 50 Can we find any more?
3 Page 3 Adding and Subtracting 2 When solving these questions, pay attention to the language of more and less and how it is worded in the context of the questions, for example: 7000 is 1000 more than which number? Well, 6000 of course! Question 2 Finding the change from $10.00 Here is an example: Tanya has bought a bottle for $1.15 and an orange for 55c. Altogether she has spent $1.70. How much change will she receive from $10.00? Our equation would look like this: $10.00 -$ 1.70 $8.30 With so many zeros in $10.00 we would have to begin borrowing from the 10. However, there is a little trick we can use to solve this question. Change your equation to $9.99 (and remember that you will have to add your 1c back to answer). Now your equation would look like this. $9.99 -$1.70 8.29 +1c.... The answer is the same!