addition
3+6
9
3+3+3=
9
2x2=
4
What symbol is this? -
subtraction or minus
What is it called when you count like this 2,4,6,8,10?
Skip counting
4+4=
8
5+5+5+5=
15
3x4=
12
What is this symbol + used for?
addition
You can use these to help solve problems, what are they?
***** ***** ***** *****
Arrays
11+11=
22
3+3+3+3+3+3
18
4x6=
24
What symbol gives you the sum of the problem?
= equals
What kind of line can you use to help you solve math problems?
number line
450+200=
650
8+8+8=
24
7x3=
21
What does this symbol X mean?
multiply
What chart can help with multiplication problems?
multiplication chart
1288+400=
1688
9+9+9+9=
36
9x3=
27
What are these symbols <>?
> greater than
< less than
691,321,898 what place value is the 3 in?
hundred thousands