问题
解答题
计算下面各题,能简算的要简算. 0.6×3.3+
(
|
答案
(1)0.6×3.3+
×7.7-0.6,3 5
=0.6×3.3+0.6×7.7-0.6,
=(3.3+7.7-1)×0.6,
=10×0.6,
=6;
(2)(
+2 3
-5 7
)÷1 2
,1 42
=(
+2 3
-5 7
)×42,1 2
=
×42+2 3
×42-5 7
×42,1 2
=28+30-21,
=37;
(3)
×[9 10
×(5 9
-1 2
)],1 6
=
×9 10
×(5 9
-1 2
),1 6
=
×(1 2
-1 2
),1 6
=
×1 2
,1 3
=
;1 6
(4)
÷[(8 27
-1 3
)×8],1 4
=
÷[8 27
×8],1 12
=
÷8 27
,2 3
=
×8 27
,3 2
=
.4 9