Mathematics 5 curriculum guide 2015 I table of contents acknowledgements

5N11 Continued...
Achievement Indicator:
5N11.4 (Continued) Solve a 
given problem that involves 
addition and subtraction of 
decimals, limited to thousandths.
Symbolically 
Ones 
Tenths 
Hundredths 
Thousandths 
2.75 
- 1.346 
Match each 
of these 
blocks with 
blocks in the 
top model 
(the greater 
number).
Compare 
and remove 
them from 
both models. 

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MATHEMATICS 5 CURRICULUM GUIDE 2015
Suggested Assessment Strategies
Resources/Notes
ADDING AND SUBTRACTING DECIMALS
General Outcome: Develop Number Sense
Authorized Resource
Math Focus 5
Lesson 7: Subtracting Decimals 
by Regrouping
TR: pp. 45-49
SB: pp. 102-105
Paper and Pencil
• Present the following problem to students: 
Mr. Browne takes his three daughters to the playground.
The three daughters decide that they want to play on the
seesaw with Dad on one end. Dad has a mass of 70 kg, the
same as the girls’ combined mass. If the oldest daughter is
the heaviest and has a mass of 29.5 kg, what are the possible
masses of the other two daughters if both of them have
masses greater than 15 kg? Find two different possibilities for
each of the two daughters.
Students could work in groups of two or three to determine
the solution and present their answers to the class. They
could use pictures, numbers and words to explain their
answer.
(5N11.4)

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MATHEMATICS 5 CURRICULUM GUIDE 2015
Specific Outcomes
ADDING AND SUBTRACTING DECIMALS