Express a fraction with denominator 10 as an equivalent fraction with denominator 100, and use this technique to add two fractions with respective denominators 10 and 100.2 For example, express 3/10 as 30/100, and add 3/10 4/100 = 34/100.
Compare two decimals to hundredths by reasoning about their size.
For example, use a visual fraction model to express 3 × (2/5) as 6 × (1/5), recognizing this product as 6/5.
(In general, n × (a/b) = (n × a)/b.) Solve word problems involving multiplication of a fraction by a whole number, e.g., by using visual fraction models and equations to represent the problem.
Determine whether a given whole number in the range 1-100 is prime or composite.
Generate a number or shape pattern that follows a given rule.For example, if each person at a party will eat 3/8 of a pound of roast beef, and there will be 5 people at the party, how many pounds of roast beef will be needed?Between what two whole numbers does your answer lie?Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem.Understand a multiple of a/b as a multiple of 1/b, and use this understanding to multiply a fraction by a whole number.Recognize that a whole number is a multiple of each of its factors.Determine whether a given whole number in the range 1-100 is a multiple of a given one-digit number.Assess the reasonableness of answers using mental computation and estimation strategies including rounding.Find all factor pairs for a whole number in the range 1-100.Explain informally why the numbers will continue to alternate in this way.Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right.