Page 160 - SK Year 5 Mathematics DLP

4 7.9 centuries + 6 centuries 42 years = centuries years

7.9 centuries = 7 centuries + 0.9 century century year
= 7 centuries + (0.9 × 100) years 7 9 0
+ 6 4 2
= 7 centuries 90 years
1 3 1 3 2
+ 1 − 1 0 0
1 4 3 2

7.9 centuries + 6 centuries 42 years = 14 centuries 32 years

5 0.82 century + 451 years = centuries years

Convert units of time to years,
as well as centuries and years.

century year
0.82 century = (0.82 × 100) years
8 2
= 82 years
+ 4 5 1
4 1 3 3
451 years = 400 years + 51 years + 1 − 1 0 0

= 4 centuries 51 years 5 3 3

0.82 century + 451 years = 5 centuries 33 years

3
6 5 centuries + 1.3 centuries = years
4
First, convert units of time in
fraction to units of time in decimal.
1
3 23 5.75 centuries
5 centuries = centuries
4 4 + 1.30 centuries
= 5.75 centuries 7.05 centuries

7.05 centuries = (7.05 × 100) years
= 705 years
3
5 centuries + 1.3 centuries = 705 years
4
State 705 years in centuries and years.

152 4.3.1 (vi)
4.3.2 (vi) • Encourage pupils to calculate using various methods of calculation.