(no subject)

[tinyjo]

So, if we're going to buy expensive schemes to teach children maths, can the providers please make sure that the activities make sense and aren't, you know, wrong or anything.

Say the number: four thousand, seven hundred and eighty-three. Ask children in their groups to write this in figures. Write it on the board to check: 4783. What is the lowest number you can add so that all four digits change? Allow 3 or 4 minutes to try this, then take feedback. (1111 is the lowest number that can be added so that all four digits change, making 5894.) Will this always be the lowest number? Can you find a 4-digit number where all four digits can be changed by adding a lower number? Ask children to explore this, starting by finding different types of number (e.g. multiples of 10 or 100) where a lower number can be added. Ask them to write some general rules (e.g. if the number ends in 9, then the lowest number that can be added to make all four digits change is 1101.)

Just.... No, don't do that! I can't even think of an interpretation that might make that make sense.

Comments

[celestialweasel.livejournal.com]

This is trying to be about carrying I think e.g. If you have 9999 then you add 1 and all 4 digits change. So I think it makes sense but is awfully written. It reads more like some Martin Gardneresque mathematical puzzle than anything.

[tortipede.livejournal.com]

Yes, it's trying to be about carrying, but still... monumental fail. Someone say "217" to the author of that resource.

[raingirl26.livejournal.com]

Yes, of course it's 217. They probably meant to say what 'jinty' said that they want all the numerals to increase not just change.

One does need a command of one's language to do math.

[tea-and-cuddles.livejournal.com]

Alas, the last bit about numbers ending in '9', using the same language about all four digits changing, means they don't require all the numerals to increase.