5.6×(4.8-4.8÷1.5)
=5.6×【4.8-4.8×2/3】
=5.6×【4.8×(1-2/3)】
=5.6×1.6
=8.96
(111+999)÷【56×(3/7-3/8)】
=111×(1+9)÷(56×3/7-56×3/8)
=1110÷(24-21)
=1110÷3
=370
13/16×(9/13×17-9/13)…………………… 乘法分配律
=13/16×9/13×17-13/16×9/13
=9/16×17-9/16
=9/16×(17-1)
=9/16×16
=9
3.8+3.8×(3.8-2..8)
=3.8+3.8
=7.6
6/11×17-12×3/11…………………… 变一变就简便
=6/11×17-6×6/11
=6/11×(17-1)
=6/11×16
=6
126×37/124…………………… 变一变,就简便.
=(124+2)×37/124…………………… 乘法分配律
=12437/124+2×37/124
=37+37/62
=37又37/62