3990 Learning at home workbook 6 ebook
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ROUNDING DECIMALS<br />
1. Round these decimals to the nearest whole number. Remember, numbers ending in .5 are rounded up.<br />
(a) 0.6 = (b) 2.4 = (c) 8.1 =<br />
(d) 4.5 = (e) 7.8 = (f) 2.2 =<br />
(g) 8.3 = (h) 13.5 = (i) 17.2 =<br />
(j) 26.9 = (k) 49.7 = (l) 76.4 =<br />
(m) 74.5 = (n) 209.6 = (o) 399.8 =<br />
2. Round the decimals to the nearest 10 before solving these addition and subtraction problems.<br />
Check your answer with the calcul<strong>at</strong>or and tick (✔) or cross (✗) to assess how close you were.<br />
Add or subtract Round Estim<strong>at</strong>e Calcul<strong>at</strong>or check (✔) or (✗)<br />
e.g. 48.9 – 19.2 = 49 – 19 = 30 29.7 ✔<br />
(a) 7.4 + 3.5 =<br />
(b) 9.8 + 6.2 =<br />
(c) 15.7 + 14.5 =<br />
(d) 42.3 + 37.9 =<br />
(e) 117.5 + 98.1 =<br />
(f) 9.7 – 5.6 =<br />
(g) 28.5 – 13.3 =<br />
(h) 45.1 – 26.6 =<br />
(i) 71.2 – 34.8 =<br />
(j) 99.9 – 44.5 =<br />
3. Round these decimals to one decimal place.<br />
(a) 3.41 = (b) 8.89 = (c) 2.34 =<br />
(d) 1.29 = (e) 4.01 = (f) 7.25 =<br />
(g) 9.66 = (h) 5.05 = (i) 6.08 =<br />
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(j) 10.05 = (k) 11.25 = (l) 9.99 =<br />
(m) 14.5 = (n) 16. 01 = (o) 18.62 =<br />
Multiply these decimals using a calcul<strong>at</strong>or. Round the answer to the nearest whole number.<br />
(a) 7.1 x 3.5 = = (b) 9.4 x 1.7 = =<br />
(c) 16.4 x 7.8 = = (d) 35.6 x 24.2 = =<br />
R.I.C. Public<strong>at</strong>ions® www.ricpublic<strong>at</strong>ions.com.au 78 ISBN 978-1-922313-88-1 <strong>Learning</strong> <strong>at</strong> <strong>home</strong> <strong>workbook</strong> 6
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