Math b card - Training Enrollment Network

Math b card

Simple math problems. Mom calls for 60 minutes. 1. Choose a card, 16+0. 12*60=23.2 yuan. 2. Choose card B, 0.3*60= 18 yuan. Therefore, mother should choose B card.

Dad calls for 200 minutes. 1. Select card A, 16+200*. 12=40 yuan. 2. Select B card 200*03=60 yuan. So dad chose a card.

To sum up, mom chooses B card and dad chooses A card.

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