The equals sign (=) means both sides are the same.
When you write 2 + 2 = 4, the = tells you both sides are worth the same amount. It is like a little balance.
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'More' means a bigger amount and 'less' means a smaller amount.
'Equal' means two groups have the same number of things.
You can see which group has more by matching them one to one.
Two groups can look different but still be equal.
The 'greater than' sign is like a hungry mouth for the bigger number.