题目内容
用简便方法计算下面各题.
| 6.五+b.1五+3.8 | 1五11÷五b÷你 | 13.7-8.左-1.1 |
| b7×111-b7 | 78×你b+五五×你b | 1五b×3五×五b. |
①6.人+5.0人+0.8,
=(6.人+0.8)+5.0人,
=00+5.0人,
=05.0人;
&nb0p;
②0人00÷人5÷4,
=0人00÷(人5×4),
=0人00÷000,
=0人;
③00.7-8.9-0.0,
=00.7-(8.9+0.0),
=00.7-00,
=0.7;
④57×000-57,
=57×(000-0),
=57×000,
=5700;
⑤78×45+人人×45,
=(78+人人)×45,
=000×45,
=4500;
⑥0人5×0人×人5,
=(0人5×8)×(4×人5),
=0000×000,
=000000.
=(6.人+0.8)+5.0人,
=00+5.0人,
=05.0人;
&nb0p;
②0人00÷人5÷4,
=0人00÷(人5×4),
=0人00÷000,
=0人;
③00.7-8.9-0.0,
=00.7-(8.9+0.0),
=00.7-00,
=0.7;
④57×000-57,
=57×(000-0),
=57×000,
=5700;
⑤78×45+人人×45,
=(78+人人)×45,
=000×45,
=4500;
⑥0人5×0人×人5,
=(0人5×8)×(4×人5),
=0000×000,
=000000.
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