Irene buys a talking doll for $10.66 and
some batteries for $4.22. She pays with a
$20 bill. Estimate how much change she
should get, to the nearest dime.

$ 5.10

Step-by-step explanation:

10.66 would turn into 10.70

4.22 would trun into 4.20

10.70 plus 4.20 = 14.90

20 minus 14.90 = 5.10

$5.10

Step-by-step explanation:

Irene pays with a $20 bill

Subtract all other values from $20

$20 - $10.66 - $4.22

$5.12

Round to the nearest dime, which is every $0.10

2 rounds down, so the final answer is $5.10

Hope this helps :)