Math Games

Grade 4 - Number

Standard 4.N.3 - Choose numbers that result in a particular difference.

Included Skills:

Demonstrate an understanding of addition of numbers with answers to 10 000 and their corresponding subtractions (limited to 3- and 4-digit numerals), concretely, pictorially, and symbolically, by
• using personal strategies
• using the standard algorithms
• estimating sums and differences
• solving problems

• Model addition and subtraction using concrete materials and visual representations, and record the process symbolically.
• Determine the sum of two numbers using a personal strategy (e.g., for 1326 + 548, record 1300 + 500 + 74).
• Determine the difference of two numbers using a personal strategy (e.g., for 4127 – 238, record 238 + 2 + 60 + 700 + 3000 + 127 or 4127 – 27 – 100 – 100 – 11).
• Model and explain the relationship that exists between an algorithm, place value, and number properties.
• Determine the sum and difference using the standard algorithms of vertical addition and subtraction. (Numbers are arranged vertically with corresponding place value digits aligned.)
• Describe a situation in which an estimate rather than an exact answer is sufficient.
• Estimate sums and differences using different strategies (e.g., front-end estimation and compensation).
• Solve problems that involve addition and subtraction of more than 2 numbers.
• Refine personal strategies to increase efficiency when appropriate (e.g., 3000 – 2999 should not require the use of an algorithm).