Starter quiz
- What operation is needed to solve this problem? Lucas has 210 marbles. He packs them equally into ten bags. How many marbles are in each bag?
- Addition
- Subtraction
- Multiplication
- Division ✓
-
Which numbers in the bar model are the addends? (MC)- 850
- 640 ✓
- 210 ✓
-
What is the missing addend in this bar model?- '185' ✓
Which two addends would make the total of 460?- 125
- 225
- 265 ✓
- 195 ✓
-
- Alex was training for a swimming race. On Monday he swam 1,400 m. On Wednesday he swam 1,500 m and on Friday he swam 1,200 m. How far did he swim?______ m
- '4,100' ✓
Complete the column addition to find the sum.- '15.39' ✓
Exit quiz
- Alex has three different fruits for a snack. He has the same number of cherries and grapes but fewer strawberries. Which model could represent this?
Which story could these number rods represent? A snack box contains:- The same number of cherries, grapes and strawberries.
- More grapes than strawberries and cherries.
- More grapes than cherries. The same number of cherries and strawberries. ✓
-
Match the model to the structure that it represents.- A⇔Additive structure ✓
- B⇔Multiplicative structure ✓
- C⇔A combination of additive and multiplicative structures ✓
- Match the structure to the correct description for the size of the parts.
- Additive structure⇔the size of the parts is unequal ✓
- Multiplicative structure⇔the size of the parts are equal ✓
- Additive and multiplicative structure⇔some parts are equal and some parts are unequal ✓
Use this model to solve the problem. Each angle in a rectangle measures 90° What is the total of all angles in the rectangle? ______°- '360' ✓
Alex was training for a swimming race. On Monday he swam 1,250 m, on Wednesday he swam 1,500 m and on Friday he swam 1,750 m. How far did he swim in total in the week?______ m- '4,500' ✓
Worksheet
Loading worksheet ...
Presentation
Loading presentation ...
Video
Lesson Details
Key learning points
- Bar models can represent the maths in a story or problem.
- A story can represent the maths presented in a representation.
- The structure of the maths can be represented by a model or a story.
Common misconception
Pupils struggle to identify appropriate sized bars that fit the problem as well as equate to the size of the whole.
Find parts that fit the structure of the problem first, then ask what the whole would be. Change the size of the whole and ask pupils which rod(s) would need to change. Encourage children to reason their decisions by comparing the size of the rods.
Keywords
Represent - To represent something means to show an idea or concept. One concept can be represented in multiple ways.
Additive - Additive means related to addition. An additive structure is one that is composed by adding parts.
Multiplicative - Multiplicative means related to multiplication. A multiplicative structure is one that is composed by multiplication.
+