Mental Math Coding Rubric
Grade 5 Multiplication Examples
18 x 3
49 x 4
25 x 12
0
1
03 Effective mental math strategy
12 Efficient mental math strategy
20 Efficient mental math
with incorrect answer
with incorrect answer
strategy with correct answer.
(or final answer omitted)
(or final answer omitted)
•Doubling and Halving:
18 x 3 = 9 x 6 = 54
•Compensation:
20 X 3 – 6 = 54
• Distributive Property:
3 x 10 + 3 x 8 = 54
15 x 3 + 3 x 3 = 45 + 9 = 54
02 Evidence that a pictorial
strategy was used to solve the
computation. (correct or incorrect)
11 Effective mental math strategy
Ex: Base ten blocks drawn
Arrays or groups drawn
Tally marks
Closed number line (every number
is represented)
•Repeated Addition
18 + 18 + 18 = 54
01 Evidence that a traditional
algorithm was used to solve the
computation (correct or incorrect)
ANY evidence of
‘carrying/borrowing/regrouping’ or
this process described in words only
•Distributive Property (4 partial
products):
20 x 10 + 20 x 2 + 5 x 10 + 5 x 2 =
300
or displayed as ‘Window method’
(or if single digit factor is written
with a zero in tens place and four
partial products shown)
with correct answer
•Doubling and Halving:
49 x 4 = 98 x 2 = 196
•Relating 4x table to 2x table:
49 x 2 = 98, 98 x 2 = 196
•Distributive Property:
20 x 12 + 5 x 12 = 300
25 x 10 + 25 x 2 = 300
•Repeated Doubling & halving:
25 x 12 = 50 x 6 = 100 x 3 = 300
2
•Compensation:
50 x 4 – 4 = 196
•Distributive Property:
40 x 4 + 9 x 4 = 196
•Doubling and Halving:
25 x 12 = 50 x 6 = 300
•Think quarters:
12 ÷ 4 = 3, 3 x 100 = 300
10 Correct answer only
NO thinking is shown
00 None of the above
Evidence that a student does not
fully understand a mental math
strategy (ie: compensation done
incorrectly in final step by using
wrong operator) or evidence of skip
counting
Color of text corresponds
to sample question of
same color.