Question

888x8.7十11.2x9.9一11.2x1.2简便计算

Answer 1

888x8.7+11.2x9.9-11.2x1.2
=888x8.7+11.2x（9.9-1.2）
=888x8.7+11.2x8.7
=（888+11.2）x8.7
=899.2x8.7
=7823.04
如果是考简便元算的话，个人觉得，前面不应该是888，而应该是88.8最合适！如果是88.8的话：
88.8x8.7+11.2x9.9-11.2x1.2
=88.8x8.7+11.2x（9.9-1.2）
=88.8x8.7+11.2x8.7
=（88.8+11.2）x8.7
=100x8.7
=870
这样更符合简便运算的规律~！

Answer 2

888x8.7十11.2x9.9一11.2x1.2简便计算
888x8.7十11.2x9.9一11.2x1.2
=888x8.7十11.2x（9.9一1.2）
=888x8.7十11.2x8.7
=（888+11.2）x8.7
=899.2*8.7
=7823.04
从题目你11.2应该是112,
888x8.7十112x9.9一112x1.2
=888x8.7十112x（9.9一1.2）
=888x8.7十112x8.7
=（888+112）x8.7
=1000*8.7
=8700

Answer 3

888x8.7十11.2x9.9一11.2x1.2简便计算
888x8.7十11.2x9.9一11.2x1.2
=888x8.7十11.2x（9.9一1.2）
=888x8.7十11.2x8.7
=8.7x（888+11.2）
=8.7x899.2
=7823.04。
前面的888应是88.8吧？

Answer 4

Answer 5

888×8.7+11.2×(9.9-1.2)=888×8.7+11.2×8.7
=(888+11.2)×8.7
=899.2×8.7
=7823.04