问题
解答题
脱式运算 (1)
(2)
(3)36×(
(4)
|
答案
(1)
×5 12
+4 15
,2 3
=
+1 9
,2 3
=
;7 9
(2)
×(5 8
÷4 5
),2 5
=
×(5 8
×4 5
),5 2
=
×2,5 8
=
;5 4
(3)36×(
+2 9
),5 12
=36×
+36×2 9
,5 12
=8+15,
=23;
(4)
×3 4
+1 13
÷13,1 4
=
×3 4
+1 13
×1 4
,1 13
=(
+3 4
)×1 4
,1 13
=1×
,1 13
=
.1 13