4 quarters = 1 dollar
This is an even trade.
=
Ten cubes are an even trade for one rod because one rod is made of ten cubes.
10 cubes
1 rod
= 10
Since one flat is made from ten rods, ten rods would be an even trade for one flat.
= 100 Is this an even trade?
10 rods
1 flat
Click the arrow to show an even trade for 17 cubes.
These 17 cubes can be traded for 1 rod and 7 cubes.
These 2 flats and 1 rod can be traded.
What is the value of 2 flats and 1 rod? 3 21 210
Click the arrows that show an even trade.
This chart shows 342.
I want to take away 3 cubes.
342 - 3 =
-3
I just found these 5 cubes. Let's add them to the 339 we have.
+5
339 + 5 339 344 334
I started with 339.
529+3 = 24-7 =
340-9 = 455+6=