Stella Academy

elementary-math Module

Interactive Simulation Screen

SYS_OK

Lesson Directive // Long MultiplicationREF_CORE

a

\times

b

Hover over a variable in the formula above, or see glossary below:

a

Multiplicand

Whole Number

b

Multiplier

Whole Number

Start from the rightmost digit of the multiplier. Multiply it by each digit of the multiplicand, right to left, carrying any tens digit.

INSIGHT: Multiplication is repeated addition — 4 × 3 means 4 added together 3 times.

For each digit in the multiplier, write the partial product on a new row, shifted one place to the left. Then add all partial products together.

INSIGHT: Each digit position represents a power of 10 — that is why you shift left.

●Telemetry Control Console

CAL_SYS

Adjust Simulator Parameters

Syllabus Worked Example

Q: Calculate 24 \times 13.

1.Multiply 24 \times 3 = 72 (first partial product).

2.Multiply 24 \times 10 = 240 (second partial product, shifted left).

3.Add: 72 + 240 = 312.

Result:24 \times 13 = 312