rounding numbers ©mathematics education centre, loughborough university
TRANSCRIPT
Rounding numbers
©Mathematics Education Centre, Loughborough University
Strategy
Use a viewer to remember• which digit is to be rounded• which digit is to be examined
©Mathematics Education Centre, Loughborough University
Use a viewer
Place over number to be rounded
Digit to be rounded
Digit to be rounded
Digit to be checked
Digit to be checked
©Mathematics Education Centre, Loughborough University
One decimal place
1 2 . 3 6 5 7
Is this digit 5
or more ?
Is this digit 5
or more ?
Round upYES
1 2 . 4 ©Mathematics Education Centre,
Loughborough University
One decimal place
2 5 . 9 2 4
Is this digit 5
or more ?
Is this digit 5
or more ?
Leave unchangedNO
2 5 . 9 ©Mathematics Education Centre,
Loughborough University
Two decimal places
1 2 . 3 6 5 7
Is this digit 5
or more ?
Is this digit 5
or more ?
Round upYES
1 2 . 3 7 ©Mathematics Education Centre,
Loughborough University
Nearest whole number
6 5 .8 5
Is this digit 5
or more ?
Is this digit 5
or more ?
Round upYES
6 6 ©Mathematics Education Centre,
Loughborough University