Question

use the drop-down menus to explain how ken can use the model to find the total weight of the baseballs. click the arrows to choose an answer from each menu. to represent the weight of one baseball, 0.3 pound, ken should shade 3 choose... . to represent the weight of all of the baseballs, he should shade this amount choose... times. the shaded part of the model will represent the expression choose... . the total weight of the baseballs is choose... pounds.

Explanation:

Step1: Analyze one baseball's weight

0.3 means 3 tenths. In a 10x10 grid (100 squares), a tenth is 10 squares. So 3 tenths would be 3 groups of 10 squares, or 3 columns (if columns represent tenths). So for one baseball (0.3 pound), shade 3 columns (or tenths - related units, but likely columns/rows of 10).

Step2: Determine number of baseballs (implied, but since there are 3 grids, maybe 3 baseballs)

If there are 3 baseballs (matching 3 grids), he should shade this amount (3 tenths) 3 times.

Step3: Expression for total weight

The expression would be \(0.3\times3\) (since each is 0.3, 3 of them).

Step4: Calculate total weight

\(0.3\times3 = 0.9\) pounds.

Answer:

1. To represent the weight of one baseball, 0.3 pound, Ken should shade 3 \(\boldsymbol{\text{columns (or tenths - sized groups)}}\).
2. To represent the weight of all of the baseballs, he should shade this amount \(\boldsymbol{3}\) times.
3. The shaded part of the model will represent the expression \(\boldsymbol{0.3\times3}\).
4. The total weight of the baseballs is \(\boldsymbol{0.9}\) pounds.