Maria is trying to work out how many workers she now has at the factory. Use your knowledge of addition to write equal group number sentences to help Maria!
More resources for Autumn Block 4 Step 3.
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Discussion points for teachers
1. Has she added the number of elves correctly in each department? If not, find and correct Maria’s mistakes.
Discuss the information given to you on the clipboard. How many elves are shown to be in each department? Which department is the smallest? Which one is the largest? Do they match up to the number sentences shown?
Maria has added the sweet department correctly. She has added the chocolate and gum departments incorrectly. She has recorded 18 and 5, instead of 20 and 4.
2. What number sentence could she use?
Discuss the total number of workers shown in the department. How many equal groups of a number would be needed to reach the target number? Would all numbers work?
Various answers, for example: 5 + 5 + 5 + 5 = 20, or 10 + 10 = 20
3. Is she correct?
Discuss how many of each fruit is shown. How are they all grouped? Do all the groups of fruit total equal groups?
Maria is incorrect. There are only 2 equal groups of pears and 3 equal groups of apples.
4. There are _______ equal groups of _______ kiwis. There are _______ equal groups of _______ mangoes.
As above, discuss how many of each fruit is shown. How can this information be used to complete the stem sentence?
There are 2 equal groups of 4 kiwis. There are 4 equal groups of 1 mango.
5. What equal groups could be in the other 4 boxes? Write an addition number sentence for each one.
Discuss the total number of sweets in each box. How can we use this information to create number sentences? Which number sentences would work? Would all number work? How do you know? This question is open-ended for the children to explore.
Various answers, for example: 10 + 10 = 20, 4 + 4 = 8, 5 + 5 + 5 + 5 + 5 = 25, 15 + 15 = 30.
6. Maria says that there could be 12 equal groups of 2 in one of the boxes of sweets. Is she correct? Explain why.
As above, discuss the total number of sweets on each box. What would 12 equal groups of 2 equal? Does this match any of the boxes?
Various answers, for example: Maria is incorrect. This is because 12 equal groups of 2 would equal 24. A box of 24 sweets is not shown.
National Curriculum Objectives
Mathematics Year 2: (2C8) Solve problems involving multiplication and division, using materials, arrays, repeated addition, mental methods, and multiplication and division facts, including problems in contexts
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