Addition and subtraction of decimals

Align the points, not the last digits. Students add and subtract decimals with regrouping and solve money and measurement stories.

Specification · for a parent or teacher

Part no. is the node's id; the realm is the kind of math; qty is how many practice items it carries.

Students can

add and subtract decimals with regrouping; solve money and measurement stories.

$12 - 4.75$ mentally ( $7.25$ ) and on paper.

$3.4 + 0.25$ added with the last digits aligned (as if $34 + 25 = 59$ , giving $0.59$ or $5.9$ ) instead of the points aligned ( $3.65$ ).