Ta có: \(987654321\cdot101-987654321\)
\(=987654321\left(101-1\right)\)
\(=98765432100\)
\(987654321\cdot101-987654321\\ =987654321\cdot\left(101-1\right)\\ =987654321\cdot100=98765432100\)
Tớ ko bt cách tính như thế nào nhưng tớ vẫn ra được là:
98765432100
Thế nhé!
987654321*101-987654321=987654321*(100+1)-987654321
=987654321*100+987654321-987654321=987654321*100=98765432100
Nhìn thấy cách làm hiểu ra hẳn luôn!
987654321*101-987654321
= 987654321*101-987654321*1 (Ko cần thiết)
= 987654321*(101-1)
= 987654321 * 100
= 98765432100
987654321.101-987654321
=987654321.101-987654321.1
=987654321.(101-1)
=987654321.100
=98765432100