Page 169 - SK Year 5 Mathematics DLP

warranty period
0.2 decade
3 Based on the information given, calculate the difference
in warranty period between these two laptops.
0.3 decade − 0.2 decade = decade

0.3 decade warranty period
−0.2 decade 0.3 decade
0.1 decade

0.3 decade − 0.2 decade = 0.1 decade
The difference in warranty period between these two laptops is 0.1 decade.

4 Calculate the balance, in years, when 47 years is subtracted from
8.1 decades.
8.1 decades – 47 years = years 7 11
8 1 years
8.1 decades = (8.1 × 10) years − 4 7 years

= 81 years 3 4 years
8.1 decades – 47 years = 34 years

1
5 9.4 decades – 2 decades = decades years
2
9.4 decades = (9.4 × 10) years
8 14 69 years
= 94 years 9 4 years = 60 years + 9 years

1 5 5 − 2 5 years
2 decades = ( × 10) years 6 9 years = (60 ÷ 10) decades + 9 years
2 2
1 = 6 decades 9 years
= 25 years
1
9.4 decades – 2 decades = 6 decades 9 years
2

1 2 3 4 7

Use the above number cards to complete the
number sentence below.
6. decades − . decades = years

4.3.1 (iv) • Ask pupils to find the difference of expiry dates of food as a wise 161
4.3.2 (iv)
consumer.