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5. 8.5.20 LO: To round decimals with one decimal place to the nearest whole number. Follow this link and watch the video of Summer Week 2 (w/c 27 April) Lesson 1 before going through this PowerPoint. https://whiterosemaths.com/homelearning/year-4/
6. When rounding, we always look at the digit to the right of what we are rounding to. When we are rounding to the nearest 100, we look at the tens digit. When we are rounding to the nearest 10, we look at the ones digit. When we are rounding to the nearest 1, we look at the tenths digit. Remember the rhyme:1, 2, 3, 4 – go back to the one before5, 6, 7, 8, 9 – go up on the numberline
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9. 2.3 is closer to 2, as there are 3 tenths.
10. DivingRound DecimalsWhat are the integers at the start and end of this number line? 2.12.22.32.42.52.62.72.82.923Complete the number lines and statements to describe how the numbers are rounded. 2.32.7232.3 is closer to than .2.3 rounds to to the nearest whole number.2.7 is closer to than .2.7 rounds to to the nearest whole number.232323
11. DivingRound DecimalsUse a number line to help round 8.5 to the nearest whole number.8.5898.5 rounds to 9. If the tenths digit is a five, you round up to the next whole number.8.5 rounds to 9 to the nearest whole number.
12. Which of these could be Tia’s number?Explain why you think these numbers round to 9.Round DecimalsDeeperTia is thinking of a number with one decimal place. Rounded to the nearest whole number, the number is 9. 9.29.59.88.59.2 has less than 5 tenths so it is closer to 9 than 10. Therefore, 9.2 rounds to 9 not 10. 8.5 rounds to 9. If the tenths digit is 5 or above, the number rounds up to the next whole number.Write one other number with one decimal place which would round to 9.Other numbers that round to 9 are: 8.6 8.7 8.8 8.9 9.0 9.1 9.3 9.4
13. Round DecimalsDeepestWhat is the smallest possible number that Jo can be thinking of?A number with one decimal place is rounded to 32.smallest = 31.5What is the largest possible number that Jo can be thinking of?largest = 32.4
14. Dive in by completing your own activity!Round Decimals