Math Games

Grade 7 - Number

Standard 7.N.2 - Solve multiplication word problems with decimals and whole numbers.

Included Skills:

Demonstrate an understanding of the addition, subtraction, multiplication, and division of decimals to solve problems (for more than 1-digit divisors or 2-digit multipliers, technology could be used).
• Solve a problem involving the addition of two or more decimal numbers.
• Solve a problem involving the subtraction of decimal numbers.
• Solve a problem involving the multiplication or division of decimal numbers (for more than 1-digit divisors or 2-digit multipliers, technology could be used).
• Place the decimal in a sum or difference using front-end estimation (e.g., for 4.5 + 0.73 + 256.458, think 4 + 256, so the sum is greater than 260).
• Place the decimal in a product using front-end estimation (e.g., for $12.33 × 2.4, think $12 × 2, so the product is greater than $24).
• Place the decimal in a quotient using front-end estimation (e.g., for 51.50 m ÷ 2.1, think 50 m ÷ 2, so the quotient is approximately 25 m).
• Check the reasonableness of answers using estimation.
• Solve a problem that involves operations on decimals (limited to thousandths), taking into consideration the order of operations.
• Explain, using an example, how to use mental math for products or quotients when the multiplier or the divisor is 0.1 or 0.5 or 0.25.