Multiplying with Decimals

Question

Marisol is making a salad using 5 ounces of spinach.
How many calories are in the spinach she is using?
6.9
× 5
Check this answer for reasonableness.
7×5=
The spinach contains
calories.
Nutritional Facts
Spinach (1 oz)
Calories
6.9 )
Fat
0.1 g
Carbohydrates
1.1
Protein
0.9 g
Marisol is making a spinach salad that calls for crushed almonds. She crushes 1.75 ounces of almonds to sprinkle on top of the salad. How many carbohydrates are in the almonds Marisol crushed?
1.75
× 6.1
175
1 0500
Nutritional Facts
Almonds (1 oz)
Calories
163
Fat
14.0 g
Carbohydrates
6.1 g
Fiber
3.5 g
Protein
6.0 g
Estimate to check.
2x6=_
The almonds contain_____ grams of carbohydrates.

Answer 1

To solve the problem, we will calculate the calories in the spinach and carbohydrates in the almonds using multiplication with decimals.

Step 1: Calculate Calories in Spinach

Marisol is using 5 ounces of spinach, and each ounce contains 6.9 calories.

To find the total calories from 5 ounces of spinach, we multiply:

\[ 6.9 \times 5 \]

Calculating:

• First, estimate: \( 7 \times 5 = 35 \).

Now calculate the exact value:

\[ 6.9 \times 5 = (6 \times 5) + (0.9 \times 5) = 30 + 4.5 = 34.5 \]

Thus, the spinach contains 34.5 calories.

Step 2: Calculate Carbohydrates in Almonds

Now, we want to calculate the carbohydrates in 1.75 ounces of almonds, which contain 6.1 grams of carbohydrates per ounce.

To find the total carbohydrates from 1.75 ounces of almonds, we multiply:

\[ 1.75 \times 6.1 \]

Estimating this calculation:

• \( 2 \times 6 = 12 \).

Now calculate the exact value:

\[ 1.75 \times 6.1 = (1.7 \times 6.1) + (0.05 \times 6.1) = 10.37 + 0.305 = 10.675 \]

So, the almonds contain 10.675 grams of carbohydrates.

Final Answers:

• Spinach contains: 34.5 calories.
• Almonds contain: 10.675 grams of carbohydrates.