Question

7км 300м*4-(9км-5км 987м)*3

Answer 1

Ответ:

Пошаговое объяснение:7300×4-(9000-5987)×3=29200-3013×3=20161=20км161м

Answer 2

To calculate the expression, follow these steps:

Step 1: Simplify the expressions inside the parentheses. Step 2: Perform the multiplication and subtraction operations. Step 3: Perform the final multiplication.

Given expression: 7km 300m * 4 - (9km - 5km 987m) * 3

Step 1:

• Inside the parentheses: (9km - 5km 987m) = 9km - (5km + 987m) [distribute the negative sign]
• Convert 5km to meters: 5km = 5,000m
• Now, inside the parentheses: (9km - 5km 987m) = 9km - (5,000m + 987m) = 9km - 5,987m

Step 2:

• Perform the subtraction inside the parentheses: 9km - 5,987m

Step 3:

• Multiply 7km 300m by 4: 7km 300m * 4 = 7,300m * 4 = 29,200m
• Multiply (9km - 5,987m) by 3: 3 * (9km - 5,987m) = 3 * 9km - 3 * 5,987m = 27km - 17,961m

Now the expression becomes: 29,200m - (27km - 17,961m)

Step 4:

• Perform the subtraction inside the parentheses: 27km - 17,961m
• Convert 27km to meters: 27km = 27,000m

Now the expression becomes: 29,200m - 27,000m + 17,961m

Step 5:

• Perform the subtraction: 29,200m - 27,000m = 2,200m

Now the expression becomes: 2,200m + 17,961m

Step 6:

• Add the two lengths in meters: 2,200m + 17,961m = 20,161m

So, the final result of the expression is 20,161 meters.