A-A+
直接写出计算结果①2-7×27=②17-17×1718=③1-12-13=④20.1+14-
问题详情
①2-7×
②17-17×
③1-
④20.1+
参考答案
①2-7×27,
=2-2,
=0;
②17-17×1718,
=17×(1-1718),
=17×118,
=1718;
③1-12-13,
=12-13,
=16;
④20.1+14-0.375,
=20.35-0.375,
=19.975;
⑤0.1252,
=0.125×0.125,
=0.015625;
⑥252÷153,
=25×2515×15×15,
=527;
⑦58×98÷38×100,
=(58×83)×(98×100),
=53×9800,
=490003;
⑧(271+169)×23+2571,
=271×23+169×23+2571,
=4671+13+2571,
=4671+2571+13,
=1+13,
=113.
考点:结果