1 Write two addition sentences to match each bar model. (a)
1
1 4
1 4
1 4
1 4
3
3
+
=
or 1
+
=
or 1
(b)
1 10 7 10
1 10
1 10
1 10
1 10
1 10
1 10
3
3
+
=
+
=
1 Sketch number lines to help complete these additions. (a) 2 __ 10 + 4 __ 10 = 4 __ 10 + 3 __ 10 = 4 __ 10 + 5 __ 10 = (b) 2 _ 8 + 5 _ 8 = 3 _ 8 + 4 _ 8 = 1 _ 8 + 6 _ 8 =
Leon is solving this problem. A cafe sells 3 _
2
5 of the sandwiches by lunch time. They sell
another 1 _
5 of the sandwiches by the end of the day. What fraction of the sandwiches were sold in total?
(a) Explain the mistake Leon has made.
170
9781380050687__text.indb 170
03/05/2022 10:20
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