Uvero — STEM Learning

Breaking Apart Multiplication

The distributive property splits a difficult factor into friendly parts. $a(b+c)=ab+ac$ , so $6\times27=6\times20+6\times7$ . A careful solution names the quantities, keeps place value or units visible, and explains why each operation fits.

Worked reasoning

Split $34$ into $30+4$ .
$8\times30+8\times4=240+32=272$ .

Use partitioning to calculate $8\times34$ .

Which statement best captures the central mathematical idea in Breaking Apart Multiplication?

$a(b+c)=ab+ac$ , so $6\times27=6\times20+6\times7$ .

A familiar-looking calculation may be used without checking place value, units, conditions or what the answer represents.

A memorised formula is valid even when its conditions are not met.

The diagram or notation replaces the need to justify each mathematical step.

When starting a problem about Breaking Apart Multiplication, which move is most reliable?

Represent the given information clearly and identify the operation or relationship required for breaking apart multiplication.

Round every value before identifying the mathematical structure.

Choose the longest available formula and substitute immediately.

Assume the desired conclusion and work backwards without checking equivalence.

Which statement is a misconception that must be rejected when working with Breaking Apart Multiplication?

A familiar-looking calculation may be used without checking place value, units, conditions or what the answer represents.

$a(b+c)=ab+ac$ , so $6\times27=6\times20+6\times7$ .

Represent the given information clearly and identify the operation or relationship required for breaking apart multiplication.

Estimate first, then reverse the operation or use a second representation to check that the answer is reasonable.