WRDSB Math LRP - G5 T2 Decimal Reasoning

Grade 5 - Tier 2

B1.5 read, represent, compare, and order decimal numbers up to hundredths, in various contexts
B1.6 round decimal numbers to the nearest tenth, in various contexts
B1.7 describe relationships and show equivalences among fractions, decimal numbers up to hundredths, and whole number percents, using appropriate tools and drawings, in various contexts
B2.3 use mental math strategies to multiply whole numbers by 0.1 and 0.01 and estimate sums and differences of decimal numbers up to hundredths, and explain the strategies used
B2.4 represent and solve problems involving the addition and subtraction of whole numbers that add up to no more than 100 000, and of decimal numbers up to hundredths, using appropriate tools, strategies, and algorithms

🖇 Encourage connections between math concepts by:

connecting forward and backward counting patterns
taking time to name the movement between place value columns as multiplication and division by factors of 10
making proportional number relationships explicit (e.g. 4 000 is half of 8 000, 0.3 is one-tenth of 3) by using a variety of concrete representations
integrating decimals and fractions with whole numbers and place value to help students work with them in familiar ways (like they have with whole numbers for years)

As Grade 5 introduces hundredths, making money connections helps to reinforce real-world connections, allows for review of naming coins and connecting value; however, money pieces ARE NOT proportional, so make use of number lines or decimal bars to help reinforce the proportional values.
Refer to the Ontario Ministry of Education's "Strategies for Mental Math" document for more information on strategies and models.

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