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Maths

Unit 1
Unit 1: Addition
Basic AdditionAdding Multi-Digit NumbersAdding Fractions
Unit 1 • Chapter 2

Adding Multi-Digit Numbers

Video Summary

A new study has found that people who are exposed to air pollution are more likely to develop dementia. The study, which was conducted by researchers at the University of California, Berkeley, found that people who lived in areas with high levels of air pollution had a 10% higher risk of developing dementia than those who lived in areas with low levels of air pollution. The study also found that the risk of dementia was highest among people who were exposed to air pollution for long periods of time.

Knowledge Check

What is the best way to avoid making mistakes when adding multi-digit numbers?

What is the difference between adding and subtracting multi-digit numbers?

What is the best way to check your work when adding multi-digit numbers?