问题
解答题
4.05-2.86-0.14 75×60%+24×
1375+450÷18×25 120÷[(
(
8÷[(
|
答案
(1)4.05-2.86-0.14
=4.05-(2.86+0.14),
=4.05-3,
=1.05;
(2)75×60%+24×
+0.63 5
=75×0.6+24×0.6+0.6,
=(75+24+1)×0.6,
=100×0.6,
=60;
(3)1375+450÷18×25
=1375+25×25,
=1375+625,
=2000;
(4)120÷[(
+11 6
)×2 3
]3 10
=120÷[
×11 6
+3 10
×2 3
],3 10
=120÷[
+11 20
],4 20
=120×
,4 3
=160;
(5)(
-3 5
)÷1 4
×3 2 15 7
=(
-3 5
)×1 4
×2 3
,15 7
=
×3 5
×2 3
-15 7
×1 4
×2 3
,15 7
=
-6 7
,10 28
=
;1 2
(6)8÷[(
-8 5
)×2 3
]2 7
=8÷[
×14 15
],2 7
=8×
,15 4
=30.