1 Copy and complete. What method will you use each time? Remember to make and estimate first and check your answers. (a) 356 + 237 (b) 428 + 356 (c) 645 + 149 (d) 708 + 251 (e) 256 + 337 (f) 456 + 328 (g) 649 + 145 (h) 758 + 201 What do you notice? Discuss why this has happened.
2 Which is the most likely answer to 396 + 195?
Copy and complete: The most likely answer is
because
.
The cost of a child’s bicycle is $439. The cost of an adult’s bicycle is $246 more. What is the cost of the adult’s bicycle? $
3
Work with a partner. Arrange the numbers in the puzzle so that the value in a circle is the total of the two pentagons that it joins.
887 252 600
416 348 955
791 539 668
Now make up a similar puzzle for others to solve.
42
9781380050694__text.indb 42
04/05/2022 15:49
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