$7{\times}8$Grade 4

Sharing Fairly

Division is sharing things out evenly — and dealing with what is left over. Find missing sides of rectangles, divide big numbers in friendly chunks, and see why long division works.

Same Amount, Different Names

Cut a bar into more pieces and the fraction changes its name but not its size. Find equivalent fractions, put them in lowest terms, and compare any two fractions.

Adding Slices

Add and subtract fractions by counting slices — and find out why the slices must be the same size first. Mixed numbers, recipes, and the classic mistake explained.

After the Decimal Point

Tenths and hundredths are just fractions wearing a decimal point. Zoom into the number line, compare decimals without falling for the classic trap, and count money.

Rectangles, Primes and Hot Dogs

Factors are the sides of rectangles. Find every rectangle a number can make, meet the numbers that refuse to be rectangles, and solve the great hot dog and bun mystery.

Turns, Corners and Fences

An angle is an amount of turn. Open angles of every size, add and split them, read the angle on a clock, and then build the field with the most room for the shortest fence.

Dots That Tell Stories

A line plot turns a pile of numbers into a picture. Read them, build them, find the most common value, and spot the odd one out.