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Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations, with a symbol, for the unknown number to represent the problem.
Size : 28.55 ko
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Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
Size : 29.45 ko
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Distinguish between defining attributes versus non-defining attributes; build and draw shapes to possess defining attributes.
Size : 46.35 ko
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Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.
Size : 28.22 ko
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