integers fraction - wrm-13b48.kxcdn.com · 5 = c) Ð 3 4 = b) Ð 2 3 = d) Ð 10 19 = 9 series....
Transcript of integers fraction - wrm-13b48.kxcdn.com · 5 = c) Ð 3 4 = b) Ð 2 3 = d) Ð 10 19 = 9 series....
Add and subtract fractions from integers expressing the answer as a single fraction
1 What is the same about the answers to the three calculations?
34
+ 14
= 25
+ 35
= 14
+ 14
+ 24
=
2 Use a bar model to explain why 35
+ 25
is equal to 1
3 Use the bar models to work out the subtractions.
a) 1 – 13
=
b) 1 – 23
=
c) 1 – 37
=
4 Work out the subtractions.
a) 1 – 15
= e) 1 – 710
=
b) 1 – 25
=
f) 1 – 911
=
c) 1 – 35
= g)
= 1 – 1120
d) 1 – 45
=
h) 1 – 78
=
Compare answers with a partner.
Did you get the same answers? Discuss your methods.
5 Work out the additions.
a) 1 + 25
= b) 15 + 13
=
2 + 25
= 15 + 23
=
3 + 25
= 15 + 33
=
7 + 25
=
© White Rose Maths 2019
c) Is the statement true or false?
3 + 54
= 4 14
Talk about it with a partner.
6 Write an addition and a subtraction for the models.
a)
b)
c)
10 1211
+ � –
7 a) Dora and Rosie are trying to work out 9 – 411
What mistakes have they made?
Dora
9 –
411 =
511
© White Rose Maths 2019
Rosie
9 – 411 =
9911
–
411
So 9 – 411 =
950
b) How would you calculate 9 – 411
Compare your method with a partner’s.
8 Work out the subtractions.
a) 3 – 25 = c) 10 – 3
4 =
b) 8 – 23
= d) 7 – 1019 =
9 There are 6 episodes in a series.
Brett has watched 34 of the first episode.
Exactly how many episodes does he need to watch to finish the series?
10 Kim orders 3 pizzas. Each pizza is sliced into 8 slices.
Kim has 3 slices and Tom has 4
Exactly how much pizza is left?
1 + � 2 –
+ � –