Question

SHOPPING Sera went to the mall and made four purchases. She spent $2.85, $5.11, $7.89, and $4.15. Use mental math to determine how much money Sera spent at the mall.

Answer 1

She spent around 20$

Explanation:

add all whole numbers and estimate the cents.

Answer 2

$20.00

Explanation:

$2.85 = 3.00 - 0.15

$5.11 = 5.00 + 0.11

$7.89 = 8.00 + 0.11 Mentally cancel the 0.11s

$4.15 = 4.00 + 0.15 Mentally cancel the 0.15s

TOTAL = 20.00 + 0.00

TOTAL = $20.00