Math Flashcards Mid-Model 2

Mathematical Expressions and Comparisons

• The expression (3 x 15) + (17 x 15) evaluates to 300, representing the total of three groups of fifteen and seventeen groups of fifteen.
• Calculating 50 x (64 + 36) yields 5,000, emphasizing the significance of order of operations in multiplication and addition.
• The operation (1,200 - 700) / 5 results in 100, illustrating the process of subtracting two numbers then dividing the difference.
• 10 x (250 + 45) equals 2,950, showing multiplication of ten with the total of two added numbers.

Summation and Multiplication

• The calculation (560 + 440) x 14 results in 14,000, showcasing the importance of summing values before scaling them.
• The expression 100 x 8 is compared to 25 x (4 x 9) to demonstrate inequality, revealing that 100 x 8 is less than the product of the other expression.
• The inequality 48 twelves > 50 twelves - 3 twelves clarifies that 48 multiplied by 12 is greater than 50 groups of twelve reduced by 3 groups of twelve.

Comparisons and Equivalents

• The statement 24 x 36 = 18 twenty-fours, doubled illustrates a connection between multiplication and comparative ratios, emphasizing how multiplication can be reframed in terms of multiples.

Simple Multiplication Facts

• The multiplication of 25 x 30 results in 750, a straightforward arithmetic fact.
• 2.5 x 30 yields 75, providing a basic multiplication example.
• The product of 514 x 33 equates to 16,962, demonstrating application in larger multiplication operations.

Real-World Application

• For a school field trip, 47 sandwiches at $4.60 each and 39 bags of chips at $1.25 each total $264.95, providing an example of budgeting and cost calculation in context.