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CK-12 Foundation
Ck 12: Arithmetic: Decimal Addition
[Free Registration/Login may be required to access all resource tools.] Add and subtract decimals with and without rounding
CK-12 Foundation
Ck 12: Arithmetic: Decimal Subtraction
[Free Registration/Login may be required to access all resource tools.] Subtracting decimals with and without rounding
CK-12 Foundation
Ck 12: Arithmetic: Front End Estimation Grade 8
[Free Registration/Login may be required to access all resource tools.] Use front-end estimation to find decimal sums and differences.
CK-12 Foundation
Ck 12: Arithmetic: Decimal Addition Using Front End Estimation
[Free Registration/Login may be required to access all resource tools.] Use front-end estimation to estimate decimal sums
CK-12 Foundation
Ck 12: Arithmetic: Decimal Subtraction Using Front End Estimation
[Free Registration/Login may be required to access all resource tools.] Estimate decimal differences using front-end estimation