45 minus 4.5. Show work

Let's do subtraction by first starting with the ones place and then the tenths place of the subtrahend.

45-4=41; 44, 43, 42, 41

41-.5 = 40.5; 40.9, 40.8, 40.7, 40.6, 40.5

45-4.5=40.5

We can check by using addition.

40.5+4.5=

44+1=

45