Write this addition as a multiplication.
$4+4+4$4+4+4
Write this addition as a multiplication.
$3+3+3+3+3+3$3+3+3+3+3+3
Write this addition as a multiplication.
$4+4+4+4+4+4+4+4+4+4$4+4+4+4+4+4+4+4+4+4
Write this addition as a multiplication.
$10+10+10$10+10+10
uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers