Question

198+132=? make a ten or a hundred to add mentally

Answer 1

2000. Because if you add the 2  it will make 1200, 2+8 is 10 so you carry the 1, and 3+9 is 12 then you add the 1 you got from 10 and you have 13. then you add 1+1 and get 2 and add the 1 you got from 13 so there you have it.

Answer 2

When rounded to tens, we get 330.

When rounded to hundreds, we get 300.

Explanation:

198+132

Rounding to nearest tens.

198 = 200

132 = 130

Adding both we get
`200+130=330`

Rounding to nearest hundreds.

198 = 200

132 = 100

Adding both we get
`200+100=300`