问题
解答题
|
答案
(1)
×8 13
+1 7
×5 7
,1 13
=
×8 13
+1 7
×1 7
,5 13
=(
+8 13
)×5 13
,1 7
=1×
,1 7
=
;1 7
(2)12÷[(
-5 6
)×3],1 3
=12÷[
×3-5 6
×3],1 3
=12÷[
-1],5 2
=12÷
,3 2
=8;
(3)24×(
+1 4
-1 6
),1 3
=24×
+24×1 4
-24×1 6
,1 3
=6+4-8,
=10-8,
=2;
(4)4.5×7.3+4
×2.7,1 2
=4.5×(7.3+2.7),
=4.5×10,
=45;
(5)1-3
÷1 11
×4 3
÷3 4
,34 11
=1-
×34 11
×3 4
×3 4
,11 34
=1-(
×34 11
)×(11 34
×3 4
),3 4
=1-1×
,9 16
=1-
,9 16
=
;7 16
(6)(1-
)÷(1 30
-2 3
+1 10
-1 6
),2 5
=(1-
)÷[(1 30
+2 3
)-(1 6
+1 10
)],2 5
=
÷[29 30
-5 6
],1 2
=
÷29 30
,1 3
=
.29 10