First we started with the ones by adding them togather 4 + 6 + 7=10. Then we add them togather 10+7=17.
Next we added the tens togather wich is 20 + 20 + 10=50. Next we added the tens and ones togather which is 50+17=67.
Now we know she practised for 67 minutes. So then we subtracted 67 from 90. 0-7 is not possible so we did 10-7=3.
Lastly we did 80-60=20 then we added that togather which is 23 so Leilani needs to practise for another 23 mins.
I learnt from others because I didn't understand the equation.
Kia ora Mahdi, I like your honest reflection, what strategy would you use to solve the equation? Did you find using the written algorithm easier? I look forward to seeing how you answer the rest of the maths problems.
ReplyDelete