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Standards that pertain to computation of whole numbers and decimals for the state of Ontario:
Grade 1:
develop proficiency in adding one-digit whole numbers
Grade 2:
develop proficiency in adding and subtracting one- and two-digit whole numbers
Grade 3:
develop proficiency in adding and subtracting three-digit whole numbers
develop proficiency in multiplying and dividing one-digit whole numbers
Grade 4:
Addition: 2 four-digit numbers
Subtraction: a four-digit number subtract a three-digit number
Multiplication: a three-digit number by a one-digit number
Division: a three-digit number by a one-digit number
Decimals: add and subtract decimal numbers to tenths using concrete materials, drawings, and symbols;
Grade 5:
Addition: 3 four-digit numbers
Subtraction: 2 four-digit numbers
Multiplication: a two-digit number by a two-digit number
Division: a four-digit number by a one-digit number
Decimals: add and subtract decimal numbers to hundredths using concrete materials, drawings, and symbols;
Decimals: multiply and divide decimal numbers to hundredths by a one-digit whole number using concrete materials, drawings, and symbols;
Grade 6:
Addition: 4 three-digit numbers
Subtraction: a five-digit number subtract a four-digit number
Multiplication: a three-digit number by a two-digit number
Division: a four-digit number by a two-digit number
Decimals: add and subtract decimal numbers to thousandths using concrete materials, drawings, and symbols
Decimals: multiply and divide decimal numbers to thousandths by a one-digit whole number
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Reference: The Ontario Curriculum, Grades 1 - 8: Mathematics, 1997(Number Sense and Numeration)
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