6 times 2 12
6 times 3 18
6 times 4 24
6 times 5 30
6 times 6 36
6 times 7 42
6 times 8 48
6 times 9 54
seven times two 14
seven times three 21
seven times four 28
seven times five 35
seven times six 42
seven times seven 49
seven times eight 56
seven times nine 63
8 times 2 16
8 times 3 24
8 times 4 32
8 times 5 40
8 times 6 48
8 times 7 56
8 times 8 64
8 times 9 72

7 x 1 7
7 x 2 14
7 x 3 21
7 x 4 28
7 x 5 35
7 x 6 42
7 x 7 49
7 x 8 56
7 x 9 63
7 x 10 70
7 x 11 77
8 x 1 8
8 x 2 16
8 x 3 24
8 x 4 32
8 x 5 40
8 x 6 48
8 x 7 56
8 x 8 64
8 x 9 72
8 x 10 80
8 x 11 88
6 x 1 6
6 x 2 12
6 x 3 18
6 x 4 24
6 x 5 30
6 x 6 36
6 x 7 42
6 x 8 48
6 x 9 54
6 x 10 60
6 x 11 66
9 x 1 9
9 x 2 18
9 x 3 27
9 x 4 36
9 x 5 45
9 x 6 54
9 x 7 63
9 x 8 64
9 x 9 81
9 x 10 90
9 x 11 99
12 x 1 12
12 x 2 24
12 X 3 36
12 X 4 48
12 X 5 60
12 X 6 72
12 X 7 84
12 X 8 96
12 X 9 108
12 X 10 120
12 X 11 132
12 X 12 144

## Number Sense: Addition & Subtraction

Term Definition
commutative (order) property of addition numbers can be added in any order and the sum will be the same;
example: 2 + 3 = 3 + 2
associative (grouping) property of addition the grouping of addends can be changed and the sum will be the same;
example: (2 + 3) + 1 = 2 + (3 + 1)
identity (zero) property of addition the sum of any number and zero is that number;
example: 2 + 0 = 2
fact family a group of related facts using the same numbers;
example:
2 + 3 = 5,
3 + 2 = 5,
5 – 3 = 2,
5 – 2 = 3
difference the answer to a subtraction problem
round to replace a number with a number that tells about how much or about how many to the nearest ten, hundred,thousand, and so on
estimate to give an approximate number or answer
compatible numbers numbers that are easy to add, subtract, multiply, or divide mentally
equation a number sentence that uses = (is equal to)

sinx 1/cscx
cosx 1/secx
tanx sinx/cosx
cscx 1/sinx
secx 1/cosx
cotx 1/tanx
cosx/sinx

1 x 10 10
2 x 10 20
3 x 10 30
4 x 10 40
5 x 10 50
6 x 10 60
7 x 10 70
8 x 10 80
9 x 10 90
10 x 10 100
2 x 2 4
3 x 3 9
4 x 4 16
5 x 5 25
6 x 6 36
7 x 7 49
8 x 8 64
9 x 9 81
6 x 8 48
7 x 8 56
9 x 8 72

## Rounding decimals

Round to the nearest whole number
2.42
2
round to the nearest whole number
3.68
4
Round to the nearest whole number
8.99
9
Round to the nearest tenth
4.56
4.6
Round to the nearest tenth
9.79
9.8
Round to the nearest hundredth
10.793
10.79
Round to the nearest hundredth
76.899
76.90
Round to the nearest whole number
90.99
91.00

## multiplication & division vocabulary

Term Definition
multiply to find the total number of objects that are in equal groups
fact family related facts that use the same numbers
array

## multiplication and division vocabulary

Term Definition
multiply to find total number of objects that are in equal groups
fact family related facts that use the same numbers
array a group of objects arranged in rows and columns
factors numbers that are multiplied to give a product
product the answer to a multiplication porblem

Fraction Decimal
1/2 0.5
1/3 0.3 Repeat
2/3 0.6 Repeat
1/4 0.25
2/4 0.5 or 0.50
3/4 0.75
1/5 0.2
2/5 0.4
3/5 0.6
4/5 0.8
1/8 0.125

## (Easter Vocab Wk 1)

Term Definition
place value the value of the position of the digits in a number, such as units, tens, hundreds, etc.
digit any numberal 0-9
standard form a name of a whole number written in customary form or in a common way, using digits
expanded notation a way of writing numbers as a sum of the value of its digits, and its place value; also known as "expanded form."
period a three-digit grouping of a number on the place value chart.