NSW Department of Education Halflife plutonium How can you write these numbers with indices 2 Halflife plutonium 2 What would come next What is happening to the index value in each step ID: 1042731
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1. Negative indicesExplicit teachingNSW Department of Education
2. Half-life – plutoniumHow can you write these numbers with indices? 2
3. Half-life – plutonium (2)What would come next? What is happening to the index value in each step? What pattern is happening as the solution changes in each step? 3
4. Half-life – plutonium (3)Negative index 4
5. Half-life – plutonium (4)What if we kept going further?5
6. Half-life – plutonium (5)What do you notice?How else could we write these denominators?What do the denominators have in common with other answers in the table?6
7. Half-life – plutonium (6)What do you notice?What is the connection between the first and third rows of the table?7
8. Negative indices – your turnDoes this work for other bases?8
9. Negative indices – your turn – solutionsBase 59
10. Negative indices rule 10