问题
解答题
|
答案
(1)
×11 21
+1 8
÷8,10 21
=
×11 21
+1 8
×10 21
,1 8
=
×(1 8
+11 21
),10 21
=
×1,1 8
=
;1 8
(2)(15-15×
)×4 5
,7 24
=3×
,7 24
=
;7 8
(3)(34+
)÷17,34 47
=34÷17+
÷17,34 47
=2+
×34 47
,1 17
=2+
,2 47
=2
;2 47
(4)(
+5 6
)×2 9
÷4 5
,19 20
=(
+45 54
)×12 54
×4 5
,20 19
=
×57 54
,16 19
=
.8 9