4NR2: Using part-whole strategies, solve problems involving addition and subtraction through the hundred-thousands place, as well as multiplication and division of multi-digit whole numbers presented in real-life, mathematical situations.
4NR2.2: Interpret, model, and solve problems involving multiplicative comparison.
4NR2.3: Solve relevant problems involving multiplication of a number with up to four digits by a 1-digit whole number or involving multiplication of two two-digit numbers using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.Â
4NR2.5 Solve multi-step problems using addition, subtraction, multiplication, division involving whole numbers. Use mental computation and estimation strategies to justify the reasonableness of solutiona
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