Speaker: Where a digit sits within a number tells you its value. Its place value. If it's a unit, a ten or a hundred, the position gives the digit a different value. This flat is for sale for £147,999 ...

Even though the digit (3) is repeated, it has a different value each time depending on what column it is in. This understanding of place value is at the heart of everything we do with numbers. Without ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Hello Brainiacs. It's Ms Kirszman. Time to get mathematical. Okay, let's warm up our brains. I've got a ...