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Numeracy

Hand mixing footings on a remote job

Concrete mixes and parts

Use parts to get the mix right every time.

20 min

How the words are written:

Matched to your check-in

Parts, not fractions on paper

A 1:2:4 mix means 1 bucket of cement, 2 buckets of sand and 4 buckets of gravel. That is 7 buckets in total. Use the same bucket every time.

Scaling the batch

You need 21 buckets in total. 21 ÷ 7 = 3. So use 3 cement, 6 sand and 12 gravel.

Knowledge check

Two quick questions to show you have it.

  1. 1. A 1:2:4 mix uses 14 buckets in total. How many buckets of cement?

  2. 2. In a 1:3 cement to sand mix, what fraction is cement?

Worksheets for this lesson

Every version is generated from this lesson. Print, save as PDF or export to Word.

  • Student worksheet

    Standard tasks with writing space.

  • Trainer answer sheet

    Every task with model answers.

  • Differentiated worksheet

    Scaffolded with sentence starters and hints.

  • Picture supported

    Visual cues beside each task.

  • Revision worksheet

    Shorter recall set for a quick review.

  • Assessment worksheet

    Marked tasks with a score box.