(1)888+999×888
=888×(999+1)
=888×1000
=888000;
(2)12.5×32×0.25
=(12.5×8)×(4×0.25)
=100×10
=1000;
(3)3-
÷5 8
-25 28
3 10
=3-(
+7 10
)3 10
=3-1
=2;
(4)
×[4 5
÷(13 16
+3 4
)]1 3
=
×[4 5
÷13 16
]5 6
=
×4 5
39 40
=
;39 50
(5)
÷[1-(7 15
-4 5
)]2 3
=
÷[1-7 15
]2 15
=
÷7 15
13 15
=
.7 13