Page 167 - SK Year 5 Mathematics DLP

2 Subtract 16.875 years and 5.625 years.
16.875 years − 5.625 years = years

1 6.875 years
− 5.625 years
1 1.250 years

16.875 years − 5.625 years = 11.25 years

3 How many more months is 30.25 years from 29 months?

30.25 years − 29 months = months 5 13
36 3 months
30.25 years = (30.25 × 12) months − 2 9 months

= 363 months 33 4 months

30.25 years − 29 months = 334 months

3
4 14.5 years − 7 years = years months
4
Method 1 14.5 years = 14 years + 0.5 year

= 14 years + (0.5 × 12) months year month
= 14 years 6 months 13 18
14 6
3 3
7 years = 7 years + year − 7 9
4 4 6 9
3 3
= 7 years + ( × 12) months
4
1
= 7 years 9 months

Method 2 3 3
year = 0.75 year 14.5 years − 7 years
4 4
= 14.5 years − 7.75 years
= 6.75 years

6.75 years = 6 years + 0.75 year
= 6 years + (0.75 × 12) months
= 6 years 9 months

3
14.5 years − 7 years = 6 years 9 months
4

4.3.1 (iii) • Explain to pupils the way to convert the unit of time from years 159
4.3.2 (iii)
to months.