Instructional Video22:24
Curated Video

Use number facts to solve addition and subtraction problems.

Pre-K - Higher Ed
Pupil outcome: I can use number facts to solve addition and subtraction problems. Key learning points: - Known facts can be used to help find new facts efficiently. - Known facts can be used to solve addition and subtraction problems. -...
Instructional Video18:54
Curated Video

Subtract multiples of ten from 2-digit numbers

Pre-K - Higher Ed
Pupil outcome: I can use number facts to subtract multiples of ten from a two-digit number. Key learning points: - When subtracting multiples of ten from a two-digit number, the tens digit changes but the ones digit stays the same. - We...
Instructional Video24:30
Curated Video

Add multiples of 10 to 2-digit numbers.

Pre-K - Higher Ed
Pupil outcome: I can use number facts to add multiples of 10 to two-digit numbers. Key learning points: - When adding multiples of ten to a two-digit number, the tens digit changes but the ones digit stays the same. - Number facts can be...
Instructional Video25:17
Curated Video

Use number facts to solve problems in measures and data contexts

Pre-K - Higher Ed
Pupil outcome: I can use number facts to solve problems in measures and data contexts. Key learning points: - Known addition and subtraction facts can be used to to help solve problems more efficiently. - Drawing a bar model can help...
Instructional Video20:31
Curated Video

Represent addition and subtraction facts within 10

Pre-K - Higher Ed
Pupil outcome: I can represent addition and subtraction facts within 10 Key learning points: - Representing a problem can help us to find addition and subtraction facts. - In addition, we can change the order of the addends and the sum...
Instructional Video24:49
Curated Video

Use known facts to find pairs of numbers that total 100

Pre-K - Higher Ed
Pupil outcome: I can use known facts to find pairs of numbers that total 100 Key learning points: - Number facts to 10 can be applied to multiples of 10 - If 3 plus 2 is equal to 5 then 3 tens plus 2 tens is equal to 5 tens. - When you...
Instructional Video24:43
Curated Video

Use known facts to add and subtract multiples of 100 within 1000

Pre-K - Higher Ed
Pupil outcome: I can add and subtract multiples of 100 Key learning points: - Known facts can be used to help calculate with multiples of a hundred. - If we know that 2 ones plus 4 ones equals 6 ones we know that 2 100s plus 4 100s...
Instructional Video25:39
Curated Video

Subtract by bridging a multiple of ten

Pre-K - Higher Ed
Pupil outcome: I can bridge ten to subtract single digit numbers from two-digit numbers. Key learning points: - When we subtract a one-digit from a two-digit number, the equation may be solved more efficiently by 'bridging ten'. - When...
Instructional Video26:23
Curated Video

Review adding 2-digit numbers using column addition without regrouping

Pre-K - Higher Ed
Pupil outcome: I can add 2-digit numbers using column addition. Key learning points: - The addends are written in columns with the same value digits in the same column. - Start by adding the numbers with the smallest place value first. -...
Instructional Video28:05
Curated Video

Multiples of 10 that total 100

Pre-K - Higher Ed
Pupil outcome: I can find multiples of 10 that total 100 Key learning points: - There are 10 tens in 100 - Knowledge of bonds to 10 can be applied to multiples of to 10 - If 4 plus 6 is equal to 10 then 4 tens plus 6 tens is equal to 10...
Instructional Video28:09
Curated Video

Solve equations involving the subtraction of two-digit numbers

Pre-K - Higher Ed
Pupil outcome: I can solve equations involving the subtraction of two-digit numbers. Key learning points: - The known part can be partitioned into tens and ones before subtracting to help subtract two-digit numbers. - Known facts and the...
Instructional Video29:20
Curated Video

Partition 2-digit numbers in different ways

Pre-K - Higher Ed
Pupil outcome: I can partition two-digit numbers in a range of ways. Key learning points: - Two-digit numbers can be partitioned into two or more parts. - Known facts can be used to help partition a two-digit number into a multiple of...
Instructional Video32:48
Curated Video

Use known facts and mental strategies to calculate with decimal numbers within and across a whole

Pre-K - Higher Ed
Pupil outcome: I can use known facts and mental strategies to calculate with decimal numbers within and across a whole. Key learning points: - If you know that 5 + 2 is equal to 7 then 5 tenths + 2 tenths is equal to 7 tenths so 0.5 +...
Instructional Video33:08
Curated Video

Add three addends efficiently using a range of strategies

Pre-K - Higher Ed
Pupil outcome: I can choose the best strategy to add three small numbers together. Key learning points: - Using commutativity allows us to simplify a problem with three addends. - Using known facts allows us to add three addends...
Instructional Video
Math Mammoth

Math Mammoth: Two Subtractions From One Addition

1st
In this video, students are introduced to the concept of fact families. Visual models are used to show how one addition fact yields two subtraction facts. They are then presented with some true or false questions and word problems. [8:44]
Instructional Video
Math Mammoth

Math Mammoth: Number Rainbow and Fact Families With 12

2nd Standards
Teaches strategies for learning the addition and subtraction facts for 12 using a number rainbow. Students are then presented with a subtraction facts drill where they practice along to the video. [6:40]
Instructional Video
Math Mammoth

Math Mammoth: Number Rainbow and Fact Families With 14

2nd
Teaches strategies for learning the subtraction facts for 14, as well as pairs of numbers that add up to 14. Students are then presented with a subtraction facts drill where they practice along to the video. [4:14]
Instructional Video
Khan Academy

Khan Academy: Add and Subtract: Pieces of Fruit

K - 1st Standards
Demonstrates how to add and subtract pieces of fruit using the numbers 5 and 3. [2:17]