Question

84×9.9+8.4×1简便计算

Answer 1

问：84×9.9+8.4×1简便计算

问：84乘九点9+8点4×1，简便计算

问：怎么写？

答：原式=8.4x99+8.4x1 =8.4x（99+1）=8.4x100=840

问：谢谢您

问：Thank you thank you thank you thank you thank you thank you，Thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you

答：解析：运用恒等变形，把84×9.9变成8.4x99

问：你倒是和我说话呀，你给我快点，小心我弄你

问：9.7乘101减9.7简便计算

答：9.7x101-9.7=9.7x（101-1）=9.7x100=970

答：以上题目都是恒等变形后，提取公因式，从而让计算得到简化