问题
解答题
|
答案
(1)35×12+350÷70,
=420+5,
=425;
(2)54.2-
+4.8-2 9
,16 9
=(54.2+4.8)-(
+2 9
),16 9
=59-2,
=57;
(3)
÷3 7
+5 6
×4 7 6 5
=
×3 7
+6 5
×4 7
,6 5
=(
+3 7
)×3 7
,6 5
=1×
,6 5
=
;6 5
(4)0.7÷[(
-5 6
)×24]1 4
=0.7÷[
×24-5 6
×24],1 4
=0.7÷[20-6],
=0.7÷14,
=0.05;
(5)(
+1 17
)×4+1 4 13 17
=
×4+1 17
×4+1 4
,13 17
=
+4 17
+1,13 17
=1+1,
=2;
(6)(
+4 5
)÷1 4
+7 3 7 10
=
×21 20
+3 7
,7 10
=
+9 20
,7 10
=
.23 20