问题
解答题
能简算的要简算 (1)2.5×12.5×32 (2)1375+450÷18×25 (3)
(4)
|
答案
(1)2.5×12.5×32
=(2.5×4)×(12.5×8),
=10×100,
=1000;
(2)1375+450÷18×25
=1375+25×25,
=1375+625,
=2000;
(3)
×0.25+5 6
×1 4 1 6
=0.25×(
+5 6
),1 6
=0.25;
(4)
×[(2 3
+0.75)÷5 8
]5 8
=
×[2 3
÷5 8
+5 8
÷3 4
],5 8
=
×[1+2 3
],6 5
=
×2 3
,11 5
=
.22 15