Question

99.9×778+33.9×666简便计算？

Answer 1

您好！很高兴回答您的问题！
99.9×778+33.9×666简便计算：
原式＝999×77.8+33.9×666
＝333×(3×77.8+33.9×2)
＝333×(233.4＋67.8)
＝333×(300＋1.2)
＝333×300＋333×1.2
＝99900＋399.6
＝100299.6
您的采纳是对我最大的支持！祝您好运！谢谢！

Answer 2

先找公因子试试
99.9x778+33.9x666
=999x77.8+33.9x666
=333x3x77.8+33.9x2x333
=333x（233.4+67.8）
=333x301.2
=333x300+333x1.2
=99900+399.6=100299.6

Answer 3

99.9×778+33.9×666
=999×(77.8+11.3×2)
=999×(100+0.4)
=99900+399.6
=100299.6

Answer 4

3*33.3*778+33.9*3*222
9*11.1*778+9*11.3*222=100299.6