1 Which methods will you use to solve these? Make estimates first. (a) 726 − 362 (b) 736 − 362 (c) 736 − 352 (d) 846 − 452 (e) 927 − 365 (f ) 849 − 283 (g) 734 − 271 (h) 558 − 294
2 Solve these problems. Can you represent them with bar models?
Make estimates first. You can also use number lines for subtraction. (a) A dress is $262 cheaper than a jacket. The jacket costs $429. What is the cost of the dress? (b) A book has a mass of 928 g. A comic has a mass of 134 g. How much heavier is one book than two comics? (c) The length of a van is 600 cm. A car is 155 cm shorter. What is the length of the car?
E
Riana thinks that she can use what she knows about subtracting with 3-digit numbers to help with subtracting 4-digit numbers. What do you think? Try your ideas out on the additions 5674 − 3251 and 6148 − 3125 Think about the methods you could use.
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04/05/2022 15:50
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