Term Two - Week One - Monday 19th April

WELCOME BACK!

Today we found out what significant figures are. These are:

• any digit (before or after decimal point) from 1-9
• any zeros between numbers from 1-9
• any zeros that are BOTH at the end of the number AND after the decimal point, and the zeros leading up to this one

e.g. 30.8 has 3sf since the zero is between numbers.

e.g. 10000 has 1sf since the zeros are not between or after a decimal point. BUT sometimes when we say 10000 we mean exactly 10000, not about 10000. If that is the case all the numbers are significant, so it has 5sf.

e.g. 0.0038 has 2sf since the zeros are not between or at the end of the number.

e.g. 0.020700 has 5sf. the first two zeros are not counted. The next one is because it is between, and the last two are because they are at the end and after the decimal point.

Homework: ex 6.01