Transcript Rounding
Rounding You can be asked to round to the nearest: • the nearest whole number, • the nearest ten/ hundred etc, • a specified number of decimal places, • a specified number of significant figures 357.956 to 2 decimal places To round: mark where you are rounding to. 357.956 If the next number down is 5 or more, your marked number goes up one. 357.95 357.96 to 2 dp. 357.956 to 1 decimal places 357.9 6 358.0 to 1 dp. The 0 is important 1359.834 • • • • • • 1359.83 to 2 dp 1359.8 to 1dp 1360 to nearest whole number 1360 to nearest ten 1400 to nearest hundred 1000 to nearest thousand Significant figures • The furthest left non zero number is your first significant figure. • e.g 596.32 0.003296 4002 • The next one right is the second sig fig and so on. 3rd sig fig 4002 1st sig fig 2nd sig fig To 3 Significant figures • • • • 596.32 = 596 0.003296 = 0.00330 4002 = 4000 So a number to 3 significant figures can have more than 3 digits if zeros are required to keep the value of the number