Maths Problem Solving Week 4: Term 3

WALT: Add and subtract decimals.

Today for this problem solving presentation We subtracted decimals but in a harder way.
For example 3.1 - 1.7 =? Now first we subtract 3 by 1 that equals 2. Subtract
1 by 7 that will equal nothing.1.7 + 1.4 = 3.1  1.7 + .3 = 2.   .2 + 1.1 = 3.1
And that is how is how you solve it.