We used place value to solve an equation.
First we start by adding the ones together 4+6=10+7 =17.
Next we add the tens which are 20+20+10=50. Now we add the answers together 17+50=67.
Now we know that she practised for 67 minutes. So now we subtract 67 from 90. 0-7 is impossible to do so we do 10-7=3.
Lastly we do 80-60=20 then we add it together which equals 23 so Leilani needs to practise for another 23 minutes.
I didn't really know what to do so I looked at other peoples and tried getting my own understanding of it.
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