Write a rule for how to compare two quantities so that the second quantity has a value of one without using a diagram

To compare two quantities, you should use a ratio (divide both numbers by the same number) to be able to compare more easily. To give the second quantity a value of one, you will divide that number by itself: 4/4 = 1. You will then also use this number (4) to divide the other number:

If you're comparing 2 to 4, divide both numbers by 4:

2/4 = 1/2
4/4 = 1

1 is clearly larger than 1/2, so 4 will be larger than 2. 

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post