Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l).
Interpret whole-number quotients of whole numbers.
Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers.
Find the area of a rectangle with whole-number side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths.
Represent a fraction a/b on a number line by marking of a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b oin the number line.
Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
Understand that the digits of a four-digit number represent amounts of thousands, hundreds, tens, and ones.
Represent these problems using equations or expressions with a letter standing for the unknown quantity.
Measure areas by counting unit squares.
Add, subtrat, multiply, or divide to solve one-step word problems involving masses or liquid volumes that are given in the same units.
Compare two fractions with the same numerator or the same denominator by reasoning about their size. Recognize that comparisons rely on the two fractions referring to the same whole. Record the results of comparisons with the symbols >, =, or <, and justify the conclusions.
Recognize and generate equivalent fractions. Explain why the fractions are equivalent.
Understand division as an unknown-factor problem.
Recognize area as additive. Find areas of figures composed of non-overlapping rectangles, and apply this technique to solve real world problems.
Understand two fractions as equivalent (equal) if they are the same size, or the same point on a number line.
Recognize a plane figure which can be covered without gaps or overlaps by n unit squares is said to have an area of n square units.
Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole.
Apply properties of operations as strategies to multiply and divide.
Use place value understanding to round whole numbers to the nearest 10 or 100.
Interpret products of whole numbers.
Multiply one-digit whole numbers by multiples of 10 in the range 10-90 using strategies based on place value and properties of operations.
Understand a fraction, 1/b, as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.
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.
Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities.
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