**Lesson Steps**:

Already answeres

**Answer**:

You just do 1x2 then add all the zeroes on. So 1x2=2+4 zeroes so 100x200= 20000

**Grade**: 1

**Level**: Primary

**Subject**: Math

**Topic**: Addition

Already answeres

You just do 1x2 then add all the zeroes on. So 1x2=2+4 zeroes so 100x200= 20000