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Fluent Addition and Subtraction

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Fluent Addition and Subtraction

Choose the best answer where there are options. Show your working for written calculations. Use the number line to show each jump.

Choose an answer

Use place value and number facts to solve each problem.

1.What is 368 + 257?

2.Find 900 − 346.

3.Which expression correctly partitions both numbers in 527 + 164?

500 + 20 + 7 + 100 + 60 + 4
500 + 27 + 164
527 + 100 + 60 + 4
500 + 20 + 7 + 100 + 6 + 4

4.Select every addition that needs regrouping between place values.

46 + 37
231 + 142
58 + 26
324 + 251

Calculate and explain

Use a column method or partitioning as directed. Include enough working to show your thinking.

5.Use a vertical column method and show any regrouping: 458 + 376 =

6.Use a vertical column method and show any regrouping: 701 − 285 =

7.Partition the numbers into hundreds, tens and ones, then use the parts to find 326 + 458.

8.In one sentence, explain why 8 ones + 7 ones can be regrouped as 1 ten and 5 ones.

Number line and mountain-hike problem

Use jumps on the number line to keep track of each addition.

9.Wiremu starts at 238 on a number line. Jump forward 250, then jump forward 37. Draw both jumps and write the number where he finishes.

10.On a mountain hike, Kahu and Ruben have climbed 684 metres. They walk down 257 metres to a resting spot. How many metres have they climbed above the starting point at the resting spot? Show a column calculation.