First Grade Number Sense

Front

What is a hundreds chart?

Back

A hundreds chart is a grid that shows numbers from 1 to 100 in rows and columns, helping us see patterns in numbers.

Tags

CCSS.1.NBT.A.1

Front

What does it mean to regroup in math?

Back

Regrouping is when you rearrange numbers, like turning 10 ones into 1 ten, to make adding or subtracting easier.

Tags

CCSS.2.NBT.B.7

Front

What is subtraction?

Back

Subtraction is taking away a number from another number to find out how many are left.

Front

What is addition?

Back

Addition is putting together two or more numbers to find the total.

Tags

CCSS.2.NBT.B.6

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals, showing the order of numbers.

Tags

CCSS.2.MD.B.6

Front

What are tens and ones?

Back

Tens are groups of ten, and ones are single units. For example, 34 has 3 tens and 4 ones.

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

Front

What is a missing number problem?

Back

A missing number problem asks you to find a number that fits in a sequence or pattern.

Tags

CCSS.2.NBT.A.2

Front

What is the value of the number 5 in the number 25?

Back

In the number 25, the 5 is in the ones place, meaning it represents 5 single units.

Tags

CCSS.4.NBT.A.1

Front

How do you find the total when you add two numbers?

Back

To find the total, you count all the units from both numbers together.

Tags

CCSS.1.OA.A.1

Front

What does it mean to complete a number line?

Back

Completing a number line means filling in the missing numbers in the correct order.

Tags

CCSS.2.MD.B.6