How it works › Playing a sum

Exercise types

Problems come in different forms.

A simple sum exercise being solved

Sum

Work out the sum and type the answer.

A number line exercise being solved

Number line

Read off where the arrow points on the number line and type that number. On the longer lines not every number is written: count along the ticks, which can go in ones, fives or tens.

A number line with counted jumps drawn as arcs, and the keypad for where they land

Jumping on the number line

Arcs show how far each jump goes, forward or back. Count the jumps and type the number the arrow lands on.

A number to place: the number above the line, and a mark where it has been tapped

Placing a number

There is a number above the line. Tap where it belongs and press Ok.

A number sequence exercise being solved

Number sequence

Work out which number comes next in the sequence and type it.

A find-the-numbers multiplication exercise: two blanks filled by tapping the numbers on offer

Find the numbers

The answer is given; the numbers that make it are not. Tap the two that do into the blanks — for a product any order will do, for a difference the larger comes first. You can't type here.

A write-the-power exercise: a repeated multiplication, and two blanks for the base and the raised exponent

Write the power

A multiplication that repeats one number is a power. Type the number into the big blank and how many times into the small raised one.

A decimal subtraction: the sum with decimals in it, and a keypad with a key for the decimal separator

Decimals

A sum with a decimal point in it. It works like any other sum; the keypad grows a point key, and the point goes where the columns say it goes.

A select-all exercise: a pie, six pies to choose from, one of them marked as chosen

Find every match

One pie, and six more to choose from. Tap every pie that has just as much shaded, however it is cut — there are between one and three. Tap again to change your mind, then Ok.

A longer round: the same sums, with a longer row of progress dots along the top

Longer round

The same exercise, with a good many more problems in it. Nothing else changes — the row of dots along the top is just longer, and finishing it is worth more wood.

A speed round: the same sums with a clock running down

Against the clock

Sums you already know, as many as you can in a minute. The clock runs down along the top, and the run ends when it does — the point is to get faster.