问题
解答题
|
答案
(1)
×5 7
+3 8
×2 7 3 8
=(
+5 7
)×2 7 3 8
=1×3 8
=
;3 8
(2)(
-4 5
)×152 3
=
×15-4 5
×152 3
=12-10
=2;
(3)
÷5+6 7
×1 7 1 5
=
×6 7
+1 5
×1 7 1 5
=(
+6 7
)×1 7 1 5
=1×1 5
=
.1 5
|
(1)
×5 7
+3 8
×2 7 3 8
=(
+5 7
)×2 7 3 8
=1×3 8
=
;3 8
(2)(
-4 5
)×152 3
=
×15-4 5
×152 3
=12-10
=2;
(3)
÷5+6 7
×1 7 1 5
=
×6 7
+1 5
×1 7 1 5
=(
+6 7
)×1 7 1 5
=1×1 5
=
.1 5