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# Number Know How

### Revision of basic rules and clues about whole numbers

Question | Answer |
---|---|

What is a Prime number? | A number that can only be divided by itself and 1 |

What is an Even number? | Any number that can be divided by 2 |

What digits do even numbers end with? | 0,2,4,6,8 |

What is an Odd number? | Any number that 2 can't go into to. |

What digits do odd numbers end with? | 1,3,5,7,9 |

What is an 'integer'? | A whole number. |

If we multiply a number by 1000 how many zeros will the answer have? | 3 |

If we multiply a number by 100 how many zeros will the answer have? | 2 |

An index number tells us what? | How many times a number will be multiplied by itself. |

When we subtract one number from another number we will find the...? | Difference |

When we add 2 or more numbers together we find the...? | Total or sum |

When we multiply 2 or more numbers together we find the...? | Product |

Following BODMAS which part do we do first in '8 + 2 x 6' ? | 2 x 6 because multiplication comes before addition. |

Using BODMAS which part will we do first in ' (3-1) x 6' ? | 3 - 1 because it's inside brackets. |

Using BODMAS which part will we do first in ' 4 + 7 - 2' ? | 4 + 7 as addition & subtraction are the same so work from left to right. |

If I'm rounding 14 to 10's will it go up to 20 or down to 10? | down because the 4 's lower than 5. |

If I'm rounding 27 to 10's will it go up to 40 or down to 30 ? | Up because the 7 is higher than 5. |

If I'm rounding 120 to 100's will it go up to 200 or down to 100? | Down to 100 |

If I'm rounding 760 to 100's will it go up to 800 or down to 700? | Up to 800 |

If I'm rounding to 1000's will 9200 go up to 10,000 or down to 9000? | Down to 9000 |

Created by:
nicolenixon