问题
解答题
脱式计算 46×8-120÷15 (12.5×8-40)÷0.6
|
答案
(1)46×8-120÷15,
=368-8,
=360;
(2)(12.5×8-40)÷0.6,
=(100-40)÷0.6,
=60÷0.6,
=100;
(3)
÷7 31
+5 2
×3 5
,7 31
=
×7 31
+2 5
×3 5
,7 31
=(
+2 5
)×3 5
,7 31
=1×
,7 31
=
;7 31
(4)
÷[(1 5
+2 3
)×1 5
],1 13
=
÷[1 5
×13 15
],1 13
=
÷1 5
,1 15
=3.