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Estimation of Whole Number Addition and Subtraction

Estimate sums and differences with rounding.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
• Video

Rounding to Estimate Sums

by CK-12 //basic
Explains how to use rounding to estimate sums.
MEMORY METER
This indicates how strong in your memory this concept is
1
• Video

Estimating Addition and Subtraction Problems Involving Whole Numbers

by CK-12 //basic
Explains how to round whole numbers to estimate addition and subtraction problems.
MEMORY METER
This indicates how strong in your memory this concept is
2