TickTockMaths

Tag: rounding

  • Rounding to decimal places

    Download the PowerPoint here

    Another rounding lesson.

    I’ve added a load of whiteboard work with this one. I really think mini whiteboards are the best place to deal with this kind of stuff.

    Again, I’m trying to use more things like number grids in my examples.

    This defiantly needs another little activity, but I haven’t quite worked out what that should be. Tweet me @ticktockmaths if you have some suggestions.

    I used to wait until these where comprehensive before posting them but I think it’s better to publish something barebones and build on it throughout the years.

    Maybe I’ll look at putting some SATs questions in there at some point.

    Some notes

    The other week I published an Order of Operations ppt, and I forgot that Jo Morgan has done an AMAZING topics in depth video on it here. Great stuff. I need to make sure I’m rechecking a lot of these before I make my lessons. I love these things. The exam boards/the DofE should provide these videos for every topic. They’re incredible.

    I was reminded about them because I’ve started a new job, in a new country. It’s scary stuff, but I now have a bit of a commute. I’ve been listening to the Mr Barton Maths podcast on the way to and from work. These podcasts are so good. I’m loving finding room for them again.

    Until next Friday

    Richard

  • Rounding to 10, 100 and 1000

    Download the resource here

    I can’t believe I haven’t made these slides before.

    I have a group with lower prior attainment this year, so I wanted to really try and be explicit when teaching this.

    In my example I went for both a number and a place value grid.

    I’ve used the place value grid a lot more this year. It was useful to highlight the tens/hundreds column and talk about rounding to this column. I think I’ll stick with making the grid way more explicit when I teach rounding. It worked well.

    There’s quite a bit of mini whiteboard work here, because I’ve found that this stuff is fairly easy, but sometimes students need a few cracks at it to make sure they’ve got it. I project a question for them to do on their mini whiteboards, then I explain it. I generally move on to the task only when the majority are displaying right answers. Then I can focus on the students who need a bit of extra support.

    There’s a Blooket link, too. I am still into Blooket. I think it’s quite fun as a little plenary.

    If you’ve got a suggestion or some feedback, get in touch on Twitter. Last week’s resource provided some really interesting discussions, especially about questions that require you to ‘add the brackets to make this sum true’.

  • Estimation

    Download the PowerPoint here.

    I created this after a discussion on Twitter.

    Estimating is more complicated then I give it credit for. We have to decide the level of rounding that’s appropriate, based on the calculation being done. It’s not just as simple as rounding to 1 s.f.

    I did some questions that are quite typical. Check the calculation by estimation.

    Then I did some ones where we need to work it out.

    And an emoji based exam question format I quite like

    There’s nothing new here, nor anything really ground breaking. But it quite a bit more thorough than I have been in the past, which pleases me.

  • Rounding to significant figures

    Download the PowerPoint here.

    I didn’t want to have an example problem pair for this. Instead I went with more of a pattern spotting thing.

    I think this is quite nice (it all animates in so isn’t displayed at once).

    Then some fluency questions.

    Then another PIXEL PUZZLE. I like these, and my ratio one is my most downloaded TES lesson.

    There’s also a little venn diagram task. Mathsvenns.com by Craig Barton has got some nice ones of these.

    Also all the usual gubbins. A learning check etc.

    I guess I could have added some ‘real life’ stuff to this, but I didn’t want to. The football stadium holds 25,675. Round this to one significant figure etc. I find those kind of questions a bit drab.

    I did, however, add this:

    It provoked some discussion.