题目内容
我能算得又快又准.

(1)72÷9+300
=8+300
=308;
(2)67+32+45
=99+45
=144;
(3)270-108-39
=162-39
=123;
(4)99+43+17
=99+(43+17)
=99+60
=159;
(5)380-50-75
=330-75
=255;
(6)81÷9+327
=9+327
=336.
=8+300
=308;
(2)67+32+45
=99+45
=144;
(3)270-108-39
=162-39
=123;
(4)99+43+17
=99+(43+17)
=99+60
=159;
(5)380-50-75
=330-75
=255;
(6)81÷9+327
=9+327
=336.
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