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## Elapsed Time on a Number Line

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Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

## Fractions Equivalent to Whole Numbers

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Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size.

## Subtracting on a Number Line

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Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.

## Fractions Using a Number Line

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Understand a fraction as a number on the number line; represent fractions on a number line diagram.

## Elapsed Time - Using a Number Line to Solve Word Problems

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Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

## Subtracting 2 Digit Numbers - no regrouping

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Subtraction using the standard algorithm.

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

## Equivalent Fractions on a Number Line

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Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size.

## Solving Equations with Unknown Numbers (addends)

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Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = □ – 3, 6 + 6 = ∆.

## Even and Odd Numbers

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Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.

## Comparing numbers

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Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.