=24 minutes
The second question:
18÷3\5÷2\3 ( 1\6 1\2)÷6\7
= 18×5\3×3\2 =8\ 12×7\6
=30×3\2 =28\36
=45
4—(3\4—3\8)×4\29
=4—3\8×4\29
=29\8×4\29
= 1\2
The first question:
3\5× 1\6×5\7 2—6\ 13÷9\26—2\3
= 1\ 10×5\7 =2—4\3—2\3
= 1\ 14 =4\3
(075—6\ 13)×(2\9+ 1\3)
=(3\4—3\ 16)×5\9
=6\ 16×5\9
=5\24
[ 1-( 1\4+3\8)÷ 1\4
= 1-5\8×4
=3\8×4
=3\2
After the operation line is the denominator.
Because I work hard, adopt it.