Math · Topic 97 of 124
Multiples of Nine
⭐ MasteredThere is a neat trick for multiples of nine: the digits of each answer add up to nine. For example, 9 × 4 = 36, and 3 + 6 = 9.
💡 Fun fact
The digits of every multiple of nine always add up to a number that is also a multiple of nine.
All about Multiples of Nine
There is a neat trick for multiples of nine: the digits of each answer add up to nine or to another multiple of nine. For example, 9 × 4 = 36, and 3 + 6 = 9. This makes it easier to check your answers.
The trick is a quick way to spot whether a number is in the nine times table.
🎮 Try it yourself!
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