YEAR 4 MEASUREMENT Lesson 28 Measurement Lesson 12

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YEAR 4 MEASUREMENT Lesson 28 Measurement Lesson #12 Solving conversion word problems involving length

YEAR 4 MEASUREMENT Lesson 28 Measurement Lesson #12 Solving conversion word problems involving length

Recap – some important things to remember when problem solving with length. 1000 metres

Recap – some important things to remember when problem solving with length. 1000 metres = 1 kilometre 1000 m = 1 km To convert from kilometres into metres, we multiply by 1000. To convert from metres into kilometres, we divide by 1000. One thing that is close to 1 m in length would be the width of a doorway. What items in your house can you find that you think are close to 1 m in length? See if an adult agrees with you. If you have a metre ruler, you could check to find out. One thing that is close to 1 km would be the distance from my house to my cousin’s house. Are there any distances you travel which are close to 1 km?

Ashley ran 1650 m in 20 minutes. Jamal ran 1. 8 km in the

Ashley ran 1650 m in 20 minutes. Jamal ran 1. 8 km in the same time. Who ran further and by how much? To work this out, I must convert one measurement so that they are both in the same unit. 1. 8 x 1000 = 1800 1. 8 km = 1800 m Then, I can compare the two numbers. 1650 m and 1800 m – which is larger? 1800 m is bigger therefore, Jamal ran further. The next part of the question asks how much further Jamal ran than Ashley. This requires us to subtract (remember the bigger number always goes first). 1800 – 1650 = 150 Answer: Jamal ran further by 150 m.

Lucy is training for a 5 KM race. She runs 2580 m the first

Lucy is training for a 5 KM race. She runs 2580 m the first day, 1090 m on the second day and 1640 m on the third day. How far has she gone in total in KM? The first part of this problem requires us to use our addition skills. Firstly, we will add 2580 and 1090 together. 2850 m + 1090 m = 3940 m Lucy ran 3490 m altogether on the first and second day of training. On the third day, Lucy runs another 1640 m so we must add that to 3490 m + 1640 m = 5580 m We have now calculated how far Lucy ran in metres but the final part of the question asks us how far she ran in kilometres. 5580 m = ? km We must divide by 1000. 5580 divided by 1000 = 5. 58 Answer: Lucy ran 5. 58 km in total.

Jacob cuts 8 km of ribbon into three pieces. The length of the first

Jacob cuts 8 km of ribbon into three pieces. The length of the first piece is 4280 metres. The length of the second piece is 2650 metres. Work out the length of the third piece. Have a go at this problem independently. I have broken it down for you at the bottom of the slide for you to check after.

Now have a go at as many problem solving questions as you can. Good

Now have a go at as many problem solving questions as you can. Good luck!