*Tell them that since they know the formula, r * t = d, they merely need to adjust to isolate "r." They can do this by dividing each side of the equation by "t," which yields the revised formula r = d ÷ t (rate or how fast the aunt is traveling = the distance she traveled divided by the time).*

A.2Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.

Assess the reasonableness of answers using mental computation and estimation strategies including rounding. Determine whether a given whole number in the range 1-100 is prime or composite. Explain informally why the numbers will continue to alternate in this way.

Adding the number of presents (1 partridge in a pear tree, 2 turtle doves, 3 French hens, 4 calling birds, 5 golden rings etc.) yields the answer 78.

The second worksheet offers problems that require a bit of reasoning, such as: "Jade has 1281 baseball cards. If Jade and Kyle combine their baseball cards, how many cards will there be?

Explain to students that you can find the rate (or speed) that someone is traveling if you know the distance and time that she traveled.

Conversely, if you know the speed (rate) that a person is traveling as well as the distance, you can calculate the time he traveled. Represent these problems using equations with a letter standing for the unknown quantity. Determine whether a given whole number in the range 1-100 is a multiple of a given one-digit number. For example, given the rule "Add 3" and the starting number 1, generate terms in the resulting sequence and observe that the terms appear to alternate between odd and even numbers. A.3Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Recognize that a whole number is a multiple of each of its factors. Identify apparent features of the pattern that were not explicit in the rule itself. Represent verbal statements of multiplicative comparisons as multiplication equations. A.1Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 × 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. By the time they reach the fourth grade, most students have developed some reading and analyzing ability.Yet, they may still be intimidated by math word problems. Explain to students that answering most word problems in the fourth grade generally involves knowing the basic math operations—addition, subtraction, multiplication, and division—and understanding when and how to use simple math formulas to improve math skills.(Partridge in a Pear Tree, 2 Turtle Doves, 3 French Hens, 4 Calling Birds, 5 Golden Rings etc.) How can you show your work?" This printable is a duplicate of the worksheet in the previous slide, with the answers to the problems included.For the second problem, students merely need to list all of the presents given on the 12 days.They can either sing the song (or sing it as a class), and list the numbers of presents given each day, or look the song up on the internet.

## Comments Problem Solving Math Grade 4

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