问题
解答题
|
答案
(1)(
+3 4
-1 2
)×24,7 12
=24×
+3 4
×24-1 2
×24,7 12
=18+12-14,
=30-14,
=16;
(2)(
×5 12
)×13 4
,1 3
=
×(5 12
×13 4
),1 3
=
×1,5 12
=
;5 12
(3)
÷(15 16
÷5 12
+5 8
),3 8
=
÷(15 16
+2 3
),3 8
=
÷15 16
,25 24
=
;9 10
(4)1.25×38+125%×3-5÷4,
=1.25×38+1.25×3-1.25,
=1.25×(38+3-1),
=1.25×40,
=50.