## Using a calculator

### Learning activity

Audio 7 (mp3 |6|KB)Round off these numbers | Value | Enter the rounded value |
---|---|---|

to the nearest whole number | 6.3 | 6 |

to the nearest whole number | 5.2 | 5 |

to the nearest ten | 78 | 80 |

to the nearest ten | 14 | 10 |

to the nearest hundred | 85 | 100 |

to the nearest hundred | 530 | 500 |

### Estimate the answers to these calculations

You may either do these sums in your head, or use a calculator.

But remember to write down your estimated answer, not the actual answer.

Calculation | Estimated value |
---|---|

42 x 68 | 2800 |

56 x 93 | 5400 |

28 x 3.9 | 120 |

7.2 x 2.1 | 14 |

Go to Working with fractions

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