来自李玲玲的问题
1997×0.71+11×714+2222×0.29=______.
1997×0.71+11×714+2222×0.29=______.
1回答
2020-04-07 23:35
1997×0.71+11×714+2222×0.29=______.
1997×0.71+11×714+2222×0.29=______.
1997×0.71+11×714+2222×0.29=1997×0.71+11×7.25+2222×0.29=1997×0.71+11×7.25+1997×0.29+225×0.29=1997×(0.71+0.29)+225×0.29+10×7.25+7.25=1997×(0.71+0.29)+225×0.29+72.5+0.29×25=1997+72.5+...