Adding And Taking Away Big Numbers

concepts · 10

1. 01

   Adding In Columns

   The student adds 5-digit and 6-digit numbers in column form and knows what a carry over is and where it goes.

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2. 02

   Lining Up The Columns

   The student arranges addends of different lengths correctly before adding, rather than stacking them as written.

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3. 03

   Properties Of Addition

   The student uses the order and zero properties to fill blanks without computing, and knows why the sum does not change.

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4. 04

   Adding Orally

   The student adds round numbers in the head by adding the short part and restoring the zeros.

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5. 05

   Addition Word Problems

   The student turns a worded situation into a labelled column sum, including when one quantity has to be worked out first.

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6. 06

   Subtracting In Columns

   The student subtracts 5-digit and 6-digit numbers with borrowing, including across a run of zeros.

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7. 07

   Finding And Checking Differences

   The student finds the difference between two numbers given in any order, and checks a subtraction by adding back.

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8. 08

   Subtracting Zero And Subtracting Orally

   The student applies the zero property, knows that subtraction order cannot be swapped, and subtracts round numbers mentally.

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9. 09

   Subtraction Word Problems

   The student recognises all four subtraction word-problem shapes in the chapter and sets each one out as a labelled column subtraction.

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10. 10

    Review And Brain Teasers

    The student works the chapter's own end-of-chapter questions unaided and knows where the remaining practice lives.

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