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A slash in mathematics signals division. For example, if you see 4/2 it would mean 4 divided by 2. It also can mean a fraction, but this is less likely. so if you saw 1/2 it would be one half, or if you performed division, 0.5
The answer to 744 times 31 equals 23,064. To solve this all you have to do is add 744 31 times.
It is not vital. Single cell creatures like a amoeba can survive without mathematics. But for higher forms of life - including many animals and birds - some form of mathematics is essential. For example, if an early humanoid with three of his friends saw an invading party of 15, he would have needed to approximate quickly that the other gang was much bigger and fighting was not such a good bet; it was time to run or hide. This sort of calculation would also apply to animals that hunt in packs. Or, is it worth 5 of you working really hard to kill a prey that will feed only two?
Yes you can. It looks like this: (()This is called "nesting" parentheses. It is applicable to both language e.g. John saw the boy (who was standing on the bridge (Wikfield's Bridge)) take the money. and in mathematics e.g. x(y+(w+10))=240
The standard price for a power saw would be around the $150 dollar range. Depending on the size or the power of the saw it may range all the way up into the $300 plus dollar range. Some have been known to cost up to $1500.