Math Games

Secondary 1 - Number and Algebra

Standard 7.NA.1 - Solve addition and subtraction sentences with positive and negative decimals.

Included Skills:

Numbers and their operations
• 1.1 primes and prime factorisation
• 1.2 finding highest common factor (HCF) and lowest common multiple (LCM), squares, cubes, square roots and cube roots by prime factorisation
• 1.3 negative numbers, integers, rational numbers, real numbers and their four operations
• 1.4 calculations with calculator
• 1.5 representation and ordering of numbers on the number line
• 1.6 use of <, >, ≥, ≤
• 1.7 approximation and estimation (including rounding off numbers to a required number of decimal places or significant figures, and estimating the results of computation)
• 1.8 Classify whole numbers based on their number of factors and explain why 0 and 1 are not primes.
• 1.9 Discuss examples of negative numbers in the real world.
• 1.10 Represent integers, rational numbers and real numbers on the number line as extension of whole numbers, fractions and decimals respectively.
• 1.11 Use algebra discs or the AlgeDisc application in AlgeTools to make sense of addition, subtraction and multiplication involving negative integers and develop proficiency in the 4 operations of integers.
• 1.12 Work in groups to estimate quantities (numbers and measures) in a variety of contexts, compare the estimates and share the estimation strategies.
• 1.13 Compare follow-through errors arising from intermediate values that are rounded to different degrees of accuracy.
• 1.14 Make estimates and check the reasonableness of answers obtained from calculators.