Add/subtract 11, 12, 13, 21, 22, 23 (three days).
Children use J10 (Jump 10, adding/subtracting two-digit numbers by adding/subtracting the tens first) to add and subtract 11, 12, 13, using a bead string initially and then recording their steps on either beaded or landmarked lines. The special cases where adding subtracting 11, 12 or 13 will take them past another multiple of ten (e.g. 48 + 13, 51 – 12) are given particular attention. Children then go on to apply the same strategy to add and subtract 21, 22 and 23 including in the context of money.
Find additional lesson plans and resources at www.hamilton-trust.org.uk.
Children use J10 (Jump 10, adding/subtracting two-digit numbers by adding/subtracting the tens first) to add and subtract 11, 12, 13, using a bead string initially and then recording their steps on either beaded or landmarked lines. The special cases where adding subtracting 11, 12 or 13 will take them past another multiple of ten (e.g. 48 + 13, 51 – 12) are given particular attention. Children then go on to apply the same strategy to add and subtract 21, 22 and 23 including in the context of money.
Find additional lesson plans and resources at www.hamilton-trust.org.uk.
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very useful resource for year 2 addition and subtraction
Three day plan and resources for teaching add/subtract 11,12,13,21,22,23. Brilliant for use in Year 2.
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