问题
解答题
合理灵活地计算下列各题.
|
答案
(1)46×8-120÷5,
=368-24,
=346;
(2)
+(2 3
-4 5
)×2 3
,5 3
=
+(2 3
-12 15
)×10 15
,5 3
=
+2 3
×2 15
,5 3
=
+2 3
,2 9
=
+6 9
,2 9
=
;8 9
(3)3.4×2.77+0.23×3.4,
=3.4×(2.77+0.23),
=3.4×3,
=10.2;
(4)
×7.7+3.3×0.8-80%,4 5
=(7.7+3.3-1)×0.8,
=10×0.8,
=8;