问题
解答题
下面各题,怎样筒便就怎样算.
|
答案
(1)18÷(4.49+34.3×0.2)
=18÷(4.49+6.86)
=18÷11.35
=1
;133 227
(2)
÷7+8 13
×1 7 5 13
=
×8 13
+1 7
×1 7 5 13
=(
+8 13
)×5 13 1 7
=1×1 7
=
;1 7
(3)
-11 10
-1 4
+3 4 9 10
=(
+11 10
)-(9 10
+1 4
)3 4
=2-1
=1;
(4)
×3.2+5.6×0.5+1.2×50%1 2
=0.5×3.2+5.6×0.5+1.2×0.5
=(3.2+5.6+1.2)×0.5
=10×0.5
=5;
(5)(9-3.06÷
)×3 5 20 13
=(9-5.1)×20 13
=3.9×20 13
=6;
(6)[1-(
-1.5)÷5 3
]×0.755 12
=[1-
÷1 6
]×0.755 12
=[1-
]×0.752 5
=
×0.753 5
=
.9 20