5+5+5=15: Why this maths answer is wrongThank you for registeringPlease refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in Parents criticise US Common Core maths after third grade pupil told solution for 5+5+5=15 is incorrectSome accuse the teacher of 'pettiness' while others say the standards will prepare students for more advanced high school maths
