Today some of us worked on some multiplication word problems. First we had to find the number sentence in the word problem. Next we needed to draw a picture of it. Then we had to solve the problem. Finally we had to explain our strategy to the rest of the group.
One of our problems was: There were five people at a party, if each person had four biscuits each. How many biscuits would be needed? Irene drew 5 plates, and put 4 biscuits on each. She then wrote a repeated addition number sentence: 4+4+4+4+4 = ? Irene then used her doubling addition strategy 4+4=8. She then double this 8+8=16. Lastly she added on the final 4 so that 16+4=20. Niamh did it a bit differently. She decided to swap 5x4 into 4x5 because she knew the answer would be the same. Niamh then drew 4 plates with 5 biscuits on each. She could have skip counted in 5s to work it out, but instead used repeated addition and doubling (like Irene) to solve the number problem.
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