Mathematics
Grade-3-
Easy
Question
Each day, you run on a treadmill for 20 minutes and lift weights for 15 minutes. The expressions can you use to find total minutes of exercise you do in 4 days is?
- 4(20 + 15)
- 15(20 + 5)
- 20(15 + 5)
- 5(20 × 15)
Hint:
The distributive property of multiplication states that when a number is multiplied by the sum of two numbers, the first number can be distributed to both of those numbers and multiplied by each of them separately, then adding the two products together for the same result as multiplying the first number by the sum.
The correct answer is: 4(20 + 15)
Here, it is given that 20 minutes are spent on treadmill and 15 minutes on lifting weights. We have to find the total times spent on exercising in 4 days.
Time spent on treadmill = 20 minutes.
Time spent on lifting weight = 15 minutes.
So, total time spent on exercising = (20 + 15) minutes.
Total minutes of exercise you do in 4 days = 4(20 + 15).
Hence, the correct option is A.
We can also find the result by individually calculating the number of hours spent on treadmill and on lifting weight and then adding.
