Math CRCT Review By Mrs. Salgado Pine Ridge Elementary

< is less than > is greater than = is equal to °F degrees Fahrenheit     °C degrees Celsius Symbols

Place Value

altogether sum total combined entire cost plus How many in all? Addition Key Words altogether sum total combined entire cost plus How many in all?

less, reduced by, remainder, least, more than, left, Subtraction Key Words fewest, less than, difference, remains, less, reduced by, remainder, least, more than, left, How much taller?, How many more?, How much more? How much saved?

product total How many times of in all altogether twice Multiplication Key Words product total How many times of in all altogether twice multiples area volume

quotient average amount of each Division quotient average amount of each divided by equal parts out of in each

Rounding Rounding is used to estimate a size or amount. Example: 12 rounded to the nearest ten is 10 66 rounded to the nearest 10 is 70 If the number is less than five you go down. If the number is five or more you go up the line.

about 30 x 10 = 300 estimate So: 32 x 9 is about 300. Estimation Estimation is used to find about how many or how much. To find an answer that is close to the exact amount. Example: 32 x 9=   about 30 x 10 = 300 estimate So: 32 x 9 is about 300.

Addition Computation The process of finding the total number of items when two or more groups of items are joined; the opposite operation of subtraction Subtraction Computation The process of finding how many are left when a number of items are taken away from a group of items; the process of finding the difference when two groups are compared; the opposite operation of addition Multiplication Facts When you combine equal groups, you can multiply to find how many in all; the opposite operation of division. 6X7=42 7X6=42

An arrangement of objects in rows and columns. Example: Arrays An arrangement of objects in rows and columns. Example: **** **** 3 x 4 = 12

Cummutative Property The property that states that you can add two numbers in any order and get the same sum. Example: 6 + 7 = 13 7 + 6 = 13

Associative Property The property that states that when the grouping of factors is changed, the product remains the same. Example: (3 x 2) x 4 = 24 3 x (2 x 4) = 24

Problem Solving Problem solving strategies: draw a picture, find a pattern, make a model, use a table or graph, write a number sentence, look for key words

Multiplication and Division Relation Between Multiplication and Division 4 x 7 = 28       28 ÷ 7 = 4 7 x 4 = 28       28 ÷ 4 = 7

The number that is to be divided Divide 2 digit numbers by 1 The number that is to be divided in a division problem is the dividend. The dividend is 35 & the divisor is 5. Example: 35 ÷ 5 = 7      

A number with one or more digits to the right of the decimal point 0.5 Decimals A number with one or more digits to the right of the decimal point Examples: 0.5 five tenths 5 10 0.25 twenty-five hundredths 25 100

Fractions A number that names part of a whole or part of a group Examples:

Adding Fractions Adding Fractions with COMMON Denominators Adding fractions with COMMON denominators is simple. Just add the top numbers (the numerators) together, and place the resulting answer in the top of a fraction using the existing denominator for the bottom number. Example : Simple fraction addition 3 + 1 = 4 5 5 5 + =