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Unit Objective Perform adding or subtracting (2-digit)±(1-digit)
with regrouping.

.Understand the concept of (2-digit)±(1-digit) with regrouping
and develop skills in adding and subtracting three numbers or
more.
.Learn how to find the sum and difference in mixed calculation.

NCTM Standards

Numbers and Operations
.Understand the effects of adding and subtracting whole numbers.
.Develop and use strategies for whole-number computations,

with a focus on addition and subtraction.

26 WWoorkrkbbooookkBB-4-4
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