+0

# need help

0
172
4
+201

I have these four problem i need help with.

0.4    2/5   0.625   1/8  1/10    - Answer is 5

0.7    0.9   1/10     0.3   10     - Answer is 0.1

2/9    3/4    1/8       7     1      4  - Answer is 1/3

3/8    1/2    1/6       9      8    10 - Answer is 2/5

To do these we need to use order of operations in order to get answer.

You can cannot move the numbers around and can't add/remove any.

Thanks

mathcalc  Oct 22, 2017
Sort:

#1
+85623
+1

Here's the first two  :

0.4  -  2/5  + 0.625 -  1/8  /  (1/10)

[2/5  -  2/5 +    5/8   -  1/8] / (1/10)

[       0        +        4/8  ]  /  ( 1/10)

[ 1/2]  /  [  1/10 ]  =          5

0.7    0.9   1/10     0.3   10

[ 0.7 *  (0.9  +   0.1)  +   0.3]   /   10

[ 0.7 * ( 1) +   0.3] / 10

[ 0.7  +  0.3] / 10

[  1]   /  10     =      0 .1

CPhill  Oct 23, 2017
#3
+201
0

Thank you

mathcalc  Oct 23, 2017
#2
+85623
+1

2/9    3/4    1/8       7     1      4

[ (2/9) / (3/4) * (1/8)  * [ ( 7 * 1) - 4] ]

[     8/27   * 1/8      *  [  7  - 4 ]  ]

[           1/27 *  3  ]  =      3 / 27    =   1 / 3

CPhill  Oct 23, 2017
#4
+85623
+1

3/8    1/2    1/6       9      8    10

[  [ (3/8) / (1/2)]  /   [ 1/6 * 9 ]   *[ 8 / 10] ]

[ ( 6/8)  / ( 9/6)   *  ( 8/10) ]

[ (3/4) / (3/2)  * ( 4/5) ]

[  (3/4) (2/3) ( 4/5) ]

[  1/2  *  4/5 ]  =     4/10   =  2/5

CPhill  Oct 23, 2017

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