STAAR Study Guide

Grade 3Mathematics

DivisionSteven had 10 marbles. He divided them up between 2 of his friends. How many marbles will each friend have?

10 marbles ÷ 2 friends = 5 marbles to each friend

Place Value

Hundred Thousands

Ten Thousands Thousands Hundreds Tens Ones

> Greater than (ex. 98 > 26)< Less than (ex. 26 < 98)= Equal to (55 = 55)

Money

Quarter- 25¢ Dime- 10¢

Nickel- 5¢ Penny- 1¢

Fractions

3 Numerator (part)8 Denominator (total number)

Addition

+ =

6 ones + 6 ones = 1 ten 2 ones (12)

Subtraction

- =

1 ten 2 ones (12) - 6 ones = 6 ones

MultiplicationJo’s Pet Store has 4 fish tanks with 3 fish in each tank. How many fish does Jo’s Pet Store have altogether?

4 fish tanks x 3 fish in each = 12 fish in all

Sum- answer to an addition problemDifference- answer to a subtraction problemProduct- answer to a multiplication problemQuotient- answer to a division problem

Estimation (Rounding)5 or more

Add one more4 or less Let it rest

Round to the nearest tens place.

469 rounds to 470

Round to the nearest hundreds place.

249 rounds to 200

Patterns

5, 12, 19, 26, , 4026+7= 33

33 is the missing number

+7 +7 +7

Fact Families3 x 11 = 33 33 ÷ 11 = 3 11 x 3 = 33 33 ÷ 3 = 11

Congruent means same size, same shape.

SymmetryA figure has symmetry when it can be folded in half so that the two halves match exactly.

Timelines

Point ‘A’ is at number 8

Point ‘Z’ is at 3 ½

A

Z

Problem Solving Strategies● drawing a picture;● looking for a pattern;● guessing and checking;● acting it out;● making a table;● working a simpler problem;● working backward.

RectangularPrism

TimeDigital Clock Traditional Clock

Area

Area= ½ base x height Area= l x w = ½ (6) x 6 = 3 x 4 = 3 x 6 = 12cm = 18cm²

6cm

6cm

4cm

3cm

Perimeter

Perimeter= s + s + s Perimeter= s + s + s + s = 6 + 6 + 8 = 4 + 3 + 4 + 3 = 20cm = 14cm

4cm

3cm

6cm

6cm

8cm

Hour Minute

Temperature

20° 60°

Measurement

3 inches

16 cm

GraphsPictograph

Circle Graph Bar Graph