❄️ Below Zero

7 phases on integers — compare and order, the number line, addition and subtraction, two-step operations, real-life situations, and absolute value & distance.

Common Core 7.NS.A.1

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How it works

1Phase 1: compare two integers and say which is greater or smaller.

2Phase 2: click the correct point for a given integer on a number line from -10 to 10.

3Phases 3-4: add and subtract integers, including negative numbers.

4Phase 5: solve two-step operations combining addition and subtraction.

5Phase 6: solve real-life word problems — temperature, elevation, bank balance.

6Phase 7: find absolute value and the distance between two integers.

Worked example

A submarine at -24 meters rises 18 meters — its new position is -24 + 18 = -6 meters.

Frequently asked questions

Do I need to know negative numbers already?

No — the first phases build the idea gradually through comparison and the number line before any arithmetic.

What grade level is this for?

It's built around Grade 7 Common Core standards on integers, but works for anyone starting to learn negative numbers.

Is there a time limit?

Yes, each question has a timer between 12 and 20 seconds depending on the phase.

For teachers and parents

Standard: Adding and subtracting rational numbers, including negatives (Common Core, Grade 7) (7.NS.A.1).

In the classroom: Good self-paced practice after introducing negative numbers and the number line in class.

At home: If your child struggles with two-step problems, have them solve one operation at a time out loud before typing the final answer.

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