题目内容
脱式计算:
(1)408÷4×5
=
=
(2)(548-233)÷5
=
=
(1)408÷4×5
=
102×5
102×5
=
510
510
(2)(548-233)÷5
=
315÷5
315÷5
=
63
63
.分析:算式(1)式中的乘法与除法为同级运算,按从左到右的顺序计算即可;
算式(2)先算括号内的加法,再算除法.
算式(2)先算括号内的加法,再算除法.
解答:解:(1)408÷4×5
=102×5,
=510;
(2)(548-233)÷5
=315÷5,
=63;
故答案为:102×5,510;315÷5,63.
=102×5,
=510;
(2)(548-233)÷5
=315÷5,
=63;
故答案为:102×5,510;315÷5,63.
点评:四则混合运算的运算顺序为:先算乘除,再算加减,有括号的要先算括号里面的.如为同级运算,按从左到右的顺序计算即可.
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