Multiply large numbers by 25. First x100, then quarter it.

ACMNA076

Develop efficient mental and written strategies and use appropriate digital technologies for multiplication and for division where there is no remainder

ACMNA100

Solve problems involving multiplication of large numbers by one- or two-digit numbers using efficient mental, written strategies and appropriate digital technologies

ACMNA291

Use efficient mental and written strategies and apply appropriate digital technologies to solve problems

ACMNA123

Select and apply efficient mental and written strategies and appropriate digital technologies to solve problems involving all four operations with whole numbers

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