作业帮知音数学培优题目5795.5795÷5.795×579.59.9×9.9+0.99 0.7777×0.7+0.1111×5.1
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 03:58:42
知音数学培优题目5795.5795÷5.795×579.59.9×9.9+0.99 0.7777×0.7+0.1111×5.1
知音数学培优题目5795.5795÷5.795×579.5
9.9×9.9+0.99
0.7777×0.7+0.1111×5.1
知音数学培优题目5795.5795÷5.795×579.59.9×9.9+0.99 0.7777×0.7+0.1111×5.1
1.5795.5795÷5.795×579.5=579.5÷5.795×5795.5795
=100×5795.5795=579557.95
2.9.9×9.9+0.99 =9.9×9.9+9.9×0.1=9.9×（9.9+0.1）=99
3.0.7777×0.7+0.1111×5.1=0.1111×7×0.7+0.1111×5.1
=0.1111×（7×0.7+5.1）=0.1111×10=1.111