计算,能简算的要简算.
(1)46.7-15.03-4.97??????????????????
(2)709-4832÷16
(3)(+)÷4+????????
(4)×[+(-)].
网友回答
解:(1)46.7-15.03-4.97
=46.7-(15.03+4.97),
=46.7-20,
=26.7;
(2)709-4832÷16
=709-4832÷(8×2),
=709-4832÷8÷2,
=709-604÷2,
=709-302,
=407;
(3)(+)÷4+?
=÷4+,
=+,
=1;
(4)×[+(-)]
=×[+],
=×+×,
=+,
=.
解析分析:(1)可用46.7减去15.03与4.97的和,结果不变;
(2)将算式中的16改写成8×2,然后再709减去用2832除以8再除以2的商,结果不变;
(3)按照分数的四则混合运算进行计算即可得到