GA Milestones Math Grade 4 cheat sheet

Each place value is 10 times the place to its right.

Round by checking the digit immediately right of the target place.

The remainder in division must be less than the divisor.

A factor divides exactly; a multiple is a product with a whole number.

1 is neither prime nor composite; 2 is the only even prime.

Estimate before multiplying to check the size of the product.

An equation is true only when both sides are equal.

Use a symbol for the unknown and write an equation that matches the situation.

Equivalent fractions multiply or divide numerator and denominator by the same nonzero number.

With like denominators, compare numerators; with like numerators, compare denominators in reverse.

Add or subtract like-denominator fractions by operating on numerators only.

Tenths have one decimal place; hundredths have two.

Annexing zeros to the right of a decimal does not change its value.

Regroup whole numbers when a fraction sum exceeds 1 or a subtraction needs borrowing.

Larger to smaller unit: multiply; smaller to larger unit: divide.

Perimeter is distance around, measured in linear units.

Area is coverage, measured in square units.

For a rectangle, P = 2(l + w) and A = l × w.

Each line-plot mark represents one data value.

Read the line-plot scale before counting marks.

A line has no endpoints, a segment has two, and a ray has one.

Angle size is measured in degrees and depends on the opening, not ray length.