How to calculate 113 × 101-113 simply?

How to calculate 113 × 101-113 simply?


113×101-113
=113×101-113×1
=113×(101-1)
=113×100
=11300
In this problem, we mainly use the law of distribution by multiplication for simple calculation



123×( )=369?


123×(3)=369



Skillful calculation: 123 × 1 + 246 × 2 + 369 × 5


123×1+246×2+369×5
=123×1+(123×2)×2+123×3×5
=123×(1+2×2+3×5)
=123×20
=2460



369+123=


492