计算,能简算的要简算.
|
(1)(
+3 8
)×24,1 12
=24×
+3 8
×24,1 12
=9+2,
=11;
(2)1÷[(
+1 3
)÷1 2
],5 12
=1÷(
÷5 6
),5 12
=1÷2,
=
;1 2
(3)12.5-
-0.625,3 8
=12.5-(0.375+0.625),
=12.5-1,
=11.5;
(4)25×125×32,
=25×125×8×4,
=(25×4)×(125×8),
=100×1000,
=100000.
计算,能简算的要简算.
|
(1)(
+3 8
)×24,1 12
=24×
+3 8
×24,1 12
=9+2,
=11;
(2)1÷[(
+1 3
)÷1 2
],5 12
=1÷(
÷5 6
),5 12
=1÷2,
=
;1 2
(3)12.5-
-0.625,3 8
=12.5-(0.375+0.625),
=12.5-1,
=11.5;
(4)25×125×32,
=25×125×8×4,
=(25×4)×(125×8),
=100×1000,
=100000.