Horizontal addition may be changed to vertical addition by writing the
problem over again vertically.
For example; 16 + 25 may be written as,
16
+ 25
Rewrite the following addition equations and solve.
Place the first number in the equation at the top of the vertical problem.
17 + 32 = __
23 + 35 = __
45 + 24 = __
67 + 21 = __
37 + 22 = __
45 + 43 = __
18 + 31 = __
17 + 82 = __
13 + 76 = __
35 + 44 = __
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