题目内容
根据运算顺序计算
700+900÷15×6
1450÷[2×(16+9)]
420+80÷(375-355)
700+900÷15×6
1450÷[2×(16+9)]
420+80÷(375-355)
分析:(1)先算除法,再算乘法,最后算加法;
(2)先算加法,再算乘法,最后算除法;
(3)先算减法,再算除法,最后算加法.
(2)先算加法,再算乘法,最后算除法;
(3)先算减法,再算除法,最后算加法.
解答:解:(1)700+900÷15×6
=700+60×6
=700+360
=1060;
(2)1450÷[2×(16+9)]
=1450÷[2×25]
=1450÷50
=29;
(3)420+80÷(375-355)
=420+80÷20
=420+4
=424.
=700+60×6
=700+360
=1060;
(2)1450÷[2×(16+9)]
=1450÷[2×25]
=1450÷50
=29;
(3)420+80÷(375-355)
=420+80÷20
=420+4
=424.
点评:此题主要考查整数的四则混合运算的运算顺序,然后再根据运算顺序进行计算.
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