Grade 3 Think Up Unit 13

Add

• to take away or remove something from a group or total.

• to combine two or more groups.

• to arrange items in alphabetical or numerical order.

• to divide a number into equal parts and find the result.

addend

• the number left over after performing division.

• a number that is multiplied by another number to find a product.

• the total sum you get after adding numbers together.

• a number that is added to another number.

approximate

• to find a result that is close to the exact answer; close or near the exact answer.

• to find the exact value of something.

• to move farther away from something.

• a precise calculation or measurement.

compatible numbers

• numbers that are only used in fractions.

• numbers that are always equal to each other.

• pairs of numbers that can easily be computed mentally, such as 23 + 27 is close to 25 + 25 so the estimate is 50.

• numbers that cannot be divided or multiplied together.

difference

• the result of multiplying two numbers together.

• the answer to a subtraction problem.

• the total amount you get after adding numbers.

• the process of comparing two shapes to find similarities.

estimate

• an answer that is close to the exact answer.

• to calculate the exact value of something.

• to completely ignore a number or value.

• to divide a number into equal parts.

round

• adding two numbers together to get a sum.

• finding the exact value of a number.

• changing a number into a fraction or a decimal.

• to approximate a number to the nearest ten, hundred, thousand, etc.

sum

• the result of subtracting one number from another.

• the process of dividing a number into equal parts.

• the answer to an addition problem.

• a number that is multiplied by another number.

regroup

• to separate numbers into smaller groups without combining them.

• to rename a number such as 10 ones = 1 ten, 10 tens = 1 hundred, 10 hundreds = 1 thousand.

• to find the total sum of two numbers.

• to multiply two numbers together to get a product.