Question

24X(6分之5-8分之3)怎么简便

还有 9又2分之1X9分之7的简便

Answer 1

24X(6分之5-8分之3)
=24X（20-9/24）
=24X11/24
=11

9又2分之1X9分之7
=(9+1/2)×7/9
=9×7/9+1/2×7/9
=7+7/18
=7又7/18

Answer 2

24*(5/6-3/8)
=24*5/6-24*3/8
=20-9
=11

9又2分之1X9分之7
=(9+1/2)×7/9
=9×7/9+1/2×7/9
=7+7/18
=7又7/18

Answer 3

9又2分之1X9分之7
=(9+1/2)×7/9
=9×7/9+1/2×7/9
=7+7/18
=7又7/18

Answer 4

24 X (5/6-3/8)
=24*5/6 -24*3/8
=20 -9
=11

( 9+1/2) X 7/9
19/2 *7/9
=19*7/18