Add together your portions 1 + 3 + 5 = 9
divide 72 by 9 = 8
Each portion is multiplied by 8
1 x 8 = 8
3 x 8 = 24
5 x 8 = 40
Your portions are 8kg:24kg:40kg
Is this correct? Add 8 + 24 + 40. Do they equal 72? yes. Your portions are correct.
The value of 4 in 2,402 is 400(four-hundred) and in 64,513 its 4,000(four-thousand)
A way to remember what you have learned is creating notes or doing practice problems