SG chevron_right Primary 3 chevron_right Measurement

I got the answer is 600cm but is wrong answer.Pls help.Thks.

SG chevron_right chevron_right

Thanks for accepting my request. I am horrible at Maths. I often take photos of my P3 girl's school Maths questions and post them in my Facebook wall for help. Now I can post here in this group for the Maths experts to help me out ☺

SG chevron_right Primary 5 chevron_right Fractions

Can anyone help to solve this question?

SG chevron_right Primary 6 chevron_right Fractions

Need help here. Thanks!

SG chevron_right Primary 6 chevron_right Fractions

I have solved the problem using algebra method. G= 80 but can anyone shows me how to do e ratio our other method as I have difficulty explaining to my girl who doesn't understand algebra yet. Many thanks