Shortcuts in Addition : Shortcuts in Addition By Monica Yuskaitis
Adding Long Columns : Adding Long Columns Since addition is Commutative it doesn’t matter which numbers you add first. 4 + 2 + 5 + 1 = 12
1 + 4 + 5 + 2 = 12
Adding Long Columns : Adding Long Columns Begin by looking for combinations of ten. 34
57
83
26 +
Adding Long Columns : Adding Long Columns Add up your ten combinations first. 34
57
83
26 + 0 2
Adding Long Columns : Adding Long Columns Add up your ten combinations again. 34
57
83
26 + 0 2 2 0
Review Combinations of Ten : Review Combinations of Ten 1 + = 10 5 + = 10
8 + = 10 7 + = 10
2 + = 10 6 + = 10
4 + = 10 3 + = 10
9 + =10
9 2 8 6 1 4 7 5 3
Adding Long Columns : Adding Long Columns When a number keeps repeating use multiplication.
32
36
88
26
36
+ 8 2
Adding Long Columns : Adding Long Columns When a number keeps repeating use multiplication.
32
36
88
26
36
+ 8 2 2 1