问题
解答题
|
答案
①7680-4680÷12×5,
=7680-390×5,
=7680-1950,
=5730;
②53×26+470×2.6,
=530×2.6+470×2.6,
=(530+470)×2.6,
=1000×2.6,
=2600;
③7.5÷(4-3.75)×4,
=7.5÷0.25×4,
=30×4,
=120;
④
÷5 7
×2 9
,14 15
=
×5 7
×9 2
,14 15
=
×45 14
,14 15
=3;
⑤[
+(3 5
-4 9
)]×45,1 3
=[
+3 5
]×45,1 9
=
×45+1 5
×45,1 9
=9+5,
=14.