Working out change from a note

Difficulty Standard · Set yjup7f

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1
Something costs $4.83 and is paid for with a $10 bill. How much change is there, in dollars?
2
Something costs $19.88 and is paid for with a $20 bill. How much change is there, in dollars?
3
Something costs $6.91 and is paid for with a $10 bill. How much change is there, in dollars?
4
Something costs $2.55 and is paid for with a $10 bill. How much change is there, in dollars?
5
Something costs $9.40 and is paid for with a $10 bill. How much change is there, in dollars?
6
Something costs $12.27 and is paid for with a $20 bill. How much change is there, in dollars?
7
Something costs $17.33 and is paid for with a $20 bill. How much change is there, in dollars?
8
Something costs $9.33 and is paid for with a $10 bill. How much change is there, in dollars?
9
Something costs $8.74 and is paid for with a $10 bill. How much change is there, in dollars?
10
Something costs $9.77 and is paid for with a $10 bill. How much change is there, in dollars?
11
Something costs $4.87 and is paid for with a $20 bill. How much change is there, in dollars?
12
Something costs $18.71 and is paid for with a $20 bill. How much change is there, in dollars?
13
Something costs $2.16 and is paid for with a $10 bill. How much change is there, in dollars?
14
Something costs $1.85 and is paid for with a $20 bill. How much change is there, in dollars?
15
Something costs $17.39 and is paid for with a $20 bill. How much change is there, in dollars?
16
Something costs $3.48 and is paid for with a $10 bill. How much change is there, in dollars?
17
Something costs $9.03 and is paid for with a $10 bill. How much change is there, in dollars?
18
Something costs $3.91 and is paid for with a $10 bill. How much change is there, in dollars?
19
Something costs $1.16 and is paid for with a $20 bill. How much change is there, in dollars?
20
Something costs $1.60 and is paid for with a $20 bill. How much change is there, in dollars?

What is in this set

The numbers in this set run from 1.02 to 20.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: the price was added to the bill; change is what is left after the price is taken away.
Answers are an amount with two decimal places.

Drawing 240 problems from this page produced 229 different ones, 95% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 4 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.