问题
解答题
用合适的方法计算. ①35×12+350÷70 ②54.2-
③0.7÷[(
|
答案
①35×12+350÷70,
=420+5,
=425;
②54.2-
+4.8-2 9
,16 9
=(54.2+4.8)-(
+2 9
),16 9
=59-2,
=57;
③0.7÷[(
-5 6
)×24],1 4
=0.7÷[
×24-5 6
×24],1 4
=0.7÷(20-6),
=0.7÷14,
=0.05.