Abacus -6 = -10 + 4 Formula | Digital Subtraction Exercises | Abacus Trainer

Improve your abacus subtraction skills by learning the -6 = -10 + 4 formula with Abacus Trainer. This lesson introduces children to a useful number-complement technique that makes subtraction easier to understand and practise.

When subtracting 6 using the abacus, students can apply the complement-of-10 method by subtracting 10 and adding 4. This helps learners understand how number combinations can be used to complete calculations.

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