14.16x5/12=80/192
16.1/5x10/11=2/11
18.1/10x4/7=4/70=2/35
20.5/9x18=90/9=10
14 is wrong.
The others are correct.
14 is 80/12
How about 6 2/3?
To solve these equations, you need to follow the order of operations, which states that you must perform multiplication and division before addition and subtraction.
Let's break down the steps for each equation:
1. 14.16 x 5 / 12 = 80 / 192
First, multiply 14.16 by 5: 14.16 x 5 = 70.8
Then divide the result by 12: 70.8 / 12 = 5.9
Therefore, 14.16 x 5 / 12 = 5.9
2. 16.1 / 5 x 10 / 11 = 2 / 11
First, divide 16.1 by 5: 16.1 / 5 = 3.22
Then multiply the result by 10: 3.22 x 10 = 32.2
Finally, divide by 11: 32.2 / 11 ≈ 2.93 (approximately)
Therefore, 16.1 / 5 x 10 / 11 ≈ 2.93
3. 18.1 / 10 x 4 / 7 = 4 / 70 = 2 / 35
Begin by dividing 18.1 by 10: 18.1 / 10 = 1.81
Then multiply the result by 4: 1.81 x 4 ≈ 7.24 (approximately)
Next, divide 7.24 by 7: 7.24 / 7 ≈ 1.04 (approximately)
Therefore, 18.1 / 10 x 4 / 7 ≈ 1.04, which is simplified to 2 / 35.
4. 20.5 / 9 x 18 = 90 / 9 = 10
Start with dividing 20.5 by 9: 20.5 / 9 ≈ 2.28 (approximately)
Then multiply the result by 18: 2.28 x 18 ≈ 41.04 (approximately)
Finally, divide 90 by 9: 90 / 9 = 10
Therefore, 20.5 / 9 x 18 = 10.