Note: Given Exp , `= 15/2 - [9/4 ÷ {5/4 - 1/2(3/2 - 1/3 -1/6)}]` `= 15/2 - [9/4 ÷ {5/4 -1/2((18 - 4 2)/12)}]` `= 15/2 - [9/4 ÷ {5/4 - 1/2}]` `= 15/2 -[9/4 ÷ 3/4]` `= 15/2 - [9/4 xx 4/3]` `= (15/2 -3)` `= 9/2` `= 4 1/2`.

Note: Given Exp , `= 1 + 1 ÷ {1 + 1 ÷ 4/3}` `= 1 + 1 ÷ {1 + 1 xx 3/4}` `= 1 + 1 ÷ {1 + 3/4}` `= 1 + 1 ÷ 7/4` `= 1 + 1 xx 4/7` `= 1 + 4/7` `= 1 4/7`.

Note: Given Exp , `= .6 xx .6 + .6 ÷ 6` `= .36 + .6/6` `= .36 + .1` `= .46`

Note: Given Exp , `= 4 - 3.6/4 + 0.2 xx 0.5` `= 4 - 0.9 + 0.1` `= 4.1 - 0.9` `= 3.2`

Note: Given Exp , `= 108 ÷ 48` of `1/4 + 2/5 xx 15/4` `= 108 ÷ 12 + 3/2` `= (108/12 + 3/2)` `= (9 + 3/2)` `= 21/2` `= 10 1/2`.

Note: Given Exp , `= (1/4 + 1/4 ÷ 5/4)/(1/4 xx 1/4 + 9/4)` `= (1/4 + 1/4 xx 4/5)/(1/16 + 9/4)` `= (1/4 + 1/5)/(1/16 + 9/4)` `= ((9/20))/((37/16))` `= (9/20 xx 16/37)` `= 36/185`.

Note: Given Exp, `= (1/5 ÷ 1/25)/(1/25 ÷ 1/5)` `= (1/5 xx 25)/(1/25 xx 5)` `= 5/(1∕5)` `= (5 xx 5/1)` `= 25`

Note: Given Exp , `=5 - [3/4 + {5/2 - (1/2 + (7 - 6)/42)}]` `= 5 - [3/4 + {5/2 - (1/2 + 1/42)}]` `= 5 - [3/4 + {5/2 - 22/42}]` `= 5 - [3/4 + 83/42]` `= 5 - [229/84]` `= ((420 - 229)/84)` `= 191/84` `= 2 23/84`.

Note: Given Exp . `= (13/4 -4/5 of 5/6)/(13/3 ÷ 1/5 - (3/10 + 106/5)` `= (13/4 - 2/3)/(13/3 ÷ 1/5 - (215/10)` `= (31/12)/(13/3 xx 5) - 215/10` `= ((31∕12))/(65/2 - 43/2)` `= ((31∕12))/(130-129/6)` `= ((31∕12))/((1/6))` `= (31/12 xx 6/1)` `= 31/2` `= 15 1/2`.

Note: Given Exp , `= 48 ÷ 12 xx (9/8 of 4/3 ÷ 3/4 of 2/3)` `= 4 xx (3/2 ÷ 1/2)` `= 4 xx (3/2 xx 2/1)` `= 4 xx 3` `= 12`.