Unit 12: Starting Worded Addition & Subtraction Problems
Year 1
Students need this knowledge first
I can place two parts into a bar model and join them to find the whole — Unit 2: Adding & Subtracting Introduction
I can start with a whole made of two parts and remove one part using a bar model — Unit 2: Adding & Subtracting Introduction
I can sort addition words and subtraction words, such as plus, add and total against subtract, take away and minus
I can decide whether a phrase is addition or subtraction by looking at the action, not just spotting a keyword
I know that words like more and difference can appear in either an addition or a subtraction, so I check the structure of the sentence
I can write the same equation for a story told with different words, because the action stays the same
Success Criteria
Lesson 1: New Words For Addition & Subtraction
We are learning to match everyday words, such as more, gave away and altogether, and specific language such as add and subtract, to the correct operation when reading a sentence.
Learning Intention
Learning Sequence
I can decide whether a worded problem is asking for the missing whole or a missing part
I can fill in the two known parts of a bar model and find the missing whole
I can fill in the whole and one known part of a bar model and find the missing part
I can write the number sentence that matches the bar model I have filled in
Success Criteria
Lesson 2: Turning Part Part Whole Worded Problems into Bar Models
We are learning to decide whether a part-part-whole word problem is missing the whole or missing a part, and to fill in a bar model to solve it.
Learning Intention
Learning Sequence
I can decide whether a joining problem is missing the whole, the start, or the change
I can fill in a bar model when the whole is missing, using the starting amount and the amount joined
I can fill in a bar model when the change part is missing, using the start and the final whole
I can fill in a bar model when the start part is missing, using the change and the final whole
Success Criteria
Lesson 3: Turning Joining Worded Problems into Bar Models
We are learning to decide whether a joining word problem is missing the whole, the starting part, or the change part, and to fill in a bar model to solve it.
Learning Intention
Learning Sequence
I can decide whether a removing problem is missing the result, the change, or the start
I can fill in a bar model when the result is missing, using the starting amount and the amount removed
I can fill in a bar model when the change part is missing, using the start and the result
I can fill in a bar model when the start part is missing, using the change and the result
Success Criteria
Lesson 4: Turning Removing Worded Problems into Bar Models
We are learning to decide whether a removing word problem is missing the result, the change part, or the starting part, and to fill in a bar model to solve it.
Learning Intention
Learning Sequence