Mastering First Grade Subtraction Tables

The video tutorial explains the process of teaching children to memorize addition tables before moving on to subtraction, highlighting that subtraction is the reverse of addition. It introduces a visual method called 'triangle adding and subtracting' to help children understand the relationship between addition and subtraction. The tutorial also suggests practical exercises using this method to reinforce learning.

What should a child memorize first before learning subtraction tables?

• Algebraic expressions

• Addition tables up to the tens

• Division facts

• Multiplication tables

Why is learning subtraction easier after mastering addition?

• Subtraction uses different numbers

• Subtraction is unrelated to addition

• Subtraction is the reverse of addition

• Addition is more complex than subtraction

Tags

CCSS.2.NBT.B.5

In the triangle method, what does the top part of the triangle represent?

• One of the components

• The total or whole

• The difference between two numbers

• A part of the whole

According to the triangle method, what does eight minus five equal?

• Five

• Thirteen

• Three

• Eight

Tags

CCSS.2.OA.A.1

How can the triangle method be used in worksheets?

• To multiply numbers

• To practice division

• To find missing numbers

• To draw geometric shapes

Tags

CCSS.4.NBT.B.6

CCSS.5.NBT.B.6

What does the triangle method emphasize when a number is left out in a problem?

• Solving for the unknown in algebra

• The need for multiplication

• Identifying whether it's addition or subtraction

• The importance of division

Tags

CCSS.5.OA.B.3