问题
解答题
怎样算简便就怎样算.
|
答案
(1)
×(8 9
+1 4
)5 8
=
×8 9
+1 4
×8 9 5 8
=
+2 9 5 9
=
;7 9
(2)56×(
-3 7
)3 8
=56×
-56×3 7 3 8
=24-21
=3;
(3)
×26+25×13 17 13 17
=
×(26+25)13 17
=
×5113 17
=39;
(4)(
×11 15
+3 5
×3 5
)÷4 15 3 5
=(
+11 15
)×4 15
×3 5 5 3
=1×(
×3 5
)5 3
=1×1
=1.