题目内容
脱式计算 8388÷9-668÷4 |
816÷3-127×2 |
172×(46-38) | (269+284)÷7. |
分析:(1)先算除法,再算减法;
(2)先算除法和乘法,再算减法;
(3)先算减法,再算乘法;
(4)先算加法,再算除法.
(2)先算除法和乘法,再算减法;
(3)先算减法,再算乘法;
(4)先算加法,再算除法.
解答:解:
(1)8388÷9-668÷4,
=932-167,
=765;
(2)816÷3-127×2,
=272-254,
=18;
(3)172×(46-38),
=172×8,
=1376;
(4)(269+284)÷7,
=553÷7,
=79.
(1)8388÷9-668÷4,
=932-167,
=765;
(2)816÷3-127×2,
=272-254,
=18;
(3)172×(46-38),
=172×8,
=1376;
(4)(269+284)÷7,
=553÷7,
=79.
点评:此题主要考查整数的四则混合运算的运算顺序,然后根据运算顺序进行计算.
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