NSF MATH SPECIALISTS S.OVERCASH & M. TAYLOR
PARTIAL-SUMS ADDITION
WORK LEFT TO
RIGHT…ADD THE COLUMNS.
THINK…
HOW MANY PARTS ??
(The
biggest number has 3 digits
so there will be 3 parts.)
483
+265
STEP 1:
ADD
400…….483
+200…..+265
600
STEP 2:
ADD
80…..483
+60…+265
600
140
STEP 3:
ADD
3….483
+5..+265
600
140
8
FINAL STEP:
ADD THE PARTS
483
+265
600
140
8
748
