CK-12 Foundation
Ck 12: Elem Math: Predicting the Missing Decimals in a Sequence
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are presented with a series of decimal numbers and must identify the pattern and fill in the missing numbers. Includes video...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Babylonian Number System
Dr. Math takes on a question about the Babylonian base-60 math system, explaining how a sexagesimal system looks and works in comparison with our decimal (base 10) system.
CK-12 Foundation
Ck 12: Elem Math: Compare and Write Inequalities Between Quotients of Decimals
[Free Registration/Login may be required to access all resource tools.] For this learning module, students use their number sense when looking at equations where decimals are being divided and fill in the blanks with >, <, or =...
CK-12 Foundation
Ck 12: Elem Math: Determining the Greatest Quotient Without Calculation
[Free Registration/Login may be required to access all resource tools.] For this learning module, students use their number sense when looking at different combinations of decimals being divided and, without calculating, state which...
CK-12 Foundation
Ck 12: Elem Math: Determining the Quotient Less Than 1 Without Calculation
[Free Registration/Login may be required to access all resource tools.] For this learning module, students use their number sense when looking at equations where decimals are being divided and, without calculating, state which quotient...