问题
解答题
脱式计算. (1)375+450÷18×25 (2)8.5×3-5.85÷1.3 (3)
(4)(
|
答案
(1)375+450÷18×25,
=375+25×25,
=375+625,
=1000;
(2)8.5×3-5.85÷1.3,
=25.5-4.5,
=21;
(3)
-(1 2
-3 4
)÷3 5
,3 4
=
-1 2
×3 20
,4 3
=
-1 2
,1 5
=
;3 10
(4)(
+7 9
)÷1 3
×8 15
,3 10
=
×10 9
×15 8
,3 10
=
.5 8