Step: 1
In the model shown, the blocks are divided into hundredths.
Step: 2
The completely shaded block represents the whole number 1. There are two partially shaded blocks. One block shows 42 hundredths shaded, and the other block shows 56 hundredths shaded.
Step: 3
To subtract, regroup one of the completely shaded blocks into hundredths and combine it with 42 hundredths.
Step: 4
142 hundredths - 56 hundredths = 86 hundredths.
[Subtract.]
Step: 5
As one of the wholes was regrouped to subtract, only one whole block remains. Combine that 1 whole with 86 hundredths to get 1.86.
Step: 6
So, the model shows that 2.42 - 0.56 = 1.86.