Addition and Subtraction

Renaming is writing a number in an equivalent form, usually in terms of its place-value parts. For example: 462 is 4 hundreds 6 tens and 2 ones, but it can be renamed as 46 tens and 2 ones, or 4 hundreds and 62 ones 4.35 = 4 ones, 3 tenths, 5 hundredths = 43 tenths, 5 hundredths = 435 hundredths 
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The numeral 0 that has the value of nothing, none, nil or nought.
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Unifix cubes are colourful interlocking cubes that help mathematicians learn number and math concepts.
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Knowing, without counting, the number pairs that make ten.
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The process of removing an amount or number from another.
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An arithmetical strategy involving partitioning a small number into two parts without counting, typically with both parts in the range 1 to 5, for example partitioning 6 into 5 +1, 4+2 and so on.
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The ability to conceive simultaneously of a whole and two parts, e.g. conceiving of 10 and also of the parts 6 and 4. This means the mathematicians do not need to rely on counting-by-ones to add and subtract.
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The representation of a number in various ways.
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A number line is a way of recording information. It is a line which represents all the numbers between one number and another. Sometimes it may be labelled with the numbers, and sometimes those that are not involved in the recording are not shown.
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Number facts are items of knowledge that children should be able to recall instantly, such as the addition and subtraction basic facts.
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