Answer
$0.83
Work Step by Step
The price is $0.98 per kg, so convert 850 g to kg. It is given $0.98 price is per kg so we need to convert the 850 g into kg
Step 1 Read the problem. The problem asks for the cost of 850 g of rice.
Step 2 Work out a plan. The price is $0.98 per kilogram, but the amount Pam scooped is given in grams. Convert grams to kilograms (the unit in the price). Then multiply the weight by the cost per kilogram.
Step 3 Estimate a reasonable answer. Round the cost of 1 kg from $0.98 to $1. There are 1000 g in a kilogram, so 1000 g is $1 so 850 grams will be $0.85. So $0.85 is our estimate.
Step 4 Solve the problem. Use a unit fraction to convert 850 g to kilograms.
Unit for the answer (kg) is in numerator; unit being changed (g) is in denominator so it will divide out. The unit fraction is (1 Kg)/(1000 g).
Multiply 850 gram times the unit fraction
850 *(1 Kg)/(1000 g) = 0.85 Kg
Now multiply 0.85 Kg times the cost per kilogram.
0.85 kg * 0.98 = 0.833 = 0.83
Step 5 State the answer. Pam will pay $0.83, rounded to the nearest cent.
Step 6 Check your work. The exact answer of $0.83 is close to our estimate of $0.85.
