问题
解答题
|
答案
(1)
×99+3 25
,3 25
=
×(99+1),3 25
=
×100,3 25
=12;
(2)7÷
+9×4 5
,5 4
=7×
+9×5 4
,5 4
=(7+9)×
,5 4
=16×
,5 4
=20;
(3)48×(
+7 12
),1 4
=48×
+48×7 12
,1 4
=28+12,
=40;
(4)
×5 11
÷1 4
×5 11
,1 4
=
×5 11
×1 4
×11 5
,1 4
=(
×5 11
)×(11 5
×1 4
),1 4
=1×
,1 16
=
.1 16