Download First Grade Math Terms

First Grade Math Terms
Module 1

Number bond – shows the whole and the parts of a number

5-group – a row of five items

Count-on – count from one number to the total. Example: 2 + 3 = 5. Start at the larger
number (3) and count 2 more (4, 5). Think 3 count 4, 5.

Addend – the numbers combined together in an addition problem

Expression – math sentence without an equal sign

Unknown – the number needed to solve the problem

Equation – math sentence with an equal sign

Commutative property – 8 + 3 = 11 and 3 + 8 = 11

Doubles – addition facts where addends are the same number.
Example: 2 + 2 = 4; 3 + 3 = 6

Doubles +1 –

Count on – start with the smallest number and count on to the larger number
2 + 3 = 5;
4

3+4+6
5 6
7
8
Count back – start with the larger number and count back to the smaller number
4
5 6
7
8

5-group drawing – groups of 5 are separated so that it is easier for students to see the
different parts
Module 2

A ten-frame – Looks just like 5-group drawings, but is made with two groups of 5, making 10.
Whenever we make ten, we draw a frame around it so we can see 10 right away.

Related facts – two different number sentences that equal the same answer.
Example: 9 + 6
and 10 + 5 are related because they both equal 15.

Decompose – To break numbers apart

Partners to ten – Two numbers that when added together make 10

Teen numbers – numbers between 10 and 20

5-groups – one group of 5