问题
解答题
简便计算.(要写出主要简便过程)
|
答案
(1)
×11 13
+3 8
×5 8 11 13
=(
+3 8
)×5 8 11 13
=1×11 13
=
;11 13
(2)
×1 4
+3 7
÷44 7
=
×1 4
+3 7
×4 7 1 4
=
×(1 4
+3 7
)4 7
=
×11 4
=
;1 4
(3)
×17 18
+9 10
÷1017 18
=
×17 18
+9 10
×17 18 1 10
=
×(17 18
+9 10
)1 10
=
×117 18
=
.17 18