Question

Subtract: 7 9 16 - 4 2 4 A) 3 7 12 B) 3 1 16 C) 3 7 20 Eliminate D) 3 11 12

Answer 1

For this case we must subtract the following mixed numbers:

`7 \frac {9} {16} - 4 \frac {2} {4}`

So:

`7 \frac {9} {16} = \frac {16 * 7 + 9} {16} = \frac {121} {16}\\4 \frac {2} {4} = \frac {4 * 4 + 2} {4} = \frac {18} {4} = \frac {9} {2}`

We subtract:

`\frac {121} {16} - \frac {9} {2} = \frac {242-144} {32} = \frac {98} {32} = \frac {49} {16}`

We convert to a mixed number, we have:

`3 \frac {1} {16}`

Answer:

`3 \frac {1} {16}`

Option B

Answer 2

B) 3 1/16

Explanation:

Given equation is

7 9/16 - 4 2/4

=> 121/16 - 18/4

=> 121/16 - (18*4)/4*4

=> 121/16 - 72/16

=> (121-72)/16

=> 49/16

=> 3 1/16