问题
解答题
|
答案
(1)25×1.25×32,
=25×1.25×(4×8),
=(25×4)×(1.25×8),
=100×10,
=1000;
(2)1
×8 13
+513 42
÷1 5 4 5
=
+1 2
,13 2
=7;
(3)
×5 21
+3 4
×23 4
+16 21
,3 4
=(
+25 21
+1)×16 21
,3 4
=4×
,3 4
=3;
(4)
÷2.4×1 5
÷2 3
,4 7
=
×1 12
÷2 3
,4 7
=
÷1 18
,4 7
=
;7 72
(5)
×34×125 11
×1 10
,2 51
=(
×125 11
)×(34×1 10
),2 51
=
×11 2
,4 3
=
;22 3
(6)1
÷(11 2
÷11 4
),1 6
=1
÷1 2
,15 14
=
.7 5