Why 5+5+5 doesn’t always make 15: Maths exam question divides the internet
Why 5+5+5 doesn’t always make 15: Working out the answer to 5x3 may seem simple enough but the solution one student gave has sparked an online debate.
The maths question, which asks pupils to work out 5x3 using the repeated addition strategy, was posted on Reddit.
View post on imgur.com
A Year 3 pupil was marked down for the solution written out for 5x3
It shows a Year 3 pupil being marked down for the solution 5+5+5, with the teacher noting the correct working out should be shown as 3+3+3+3+3.
A second question asks students to draw an array to show and solve 4x6, with the student drawing six rows of four as the answer. This is also marked as incorrect, with the teacher highlighting four rows of six as how it should be written out.
The National Council of Teachers of Math...