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krystalhurst97
10.10.2019 •
Mathematics
How can we write an expression to show 3 less than a number?
start by drawing a diagram to model the subtraction. are we taking away from the 3 or the unknown number?
what expression would represent this model?
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Ответ:
x - 3
Step-by-step explanation:
Let x be the unknown number,
For making the diagram to model this problem,
Take a grid that shows x,
Divide this grid into two parts,
If first part is of 3 then second part would be x - 3
That is, we are taking away 3 from the unknown number,
Hence, the required expression would be x - 3
Ответ:
7 1/2 hrs = 7.5×60 = 450 min
thus she can see 450÷25 = 18 patients