Understanding Basic Math Concepts

Mrs. Cross, a second-grade math teacher, introduces a lesson on adding and subtracting like units. The lesson covers key vocabulary, such as base ten blocks and number bonds, and includes a game called 'Ten Frame Flash' to help students understand number pairs. Students learn to create addition and subtraction sentences and explore fact families. The lesson emphasizes breaking down numbers into tens and ones to simplify calculations. Practice exercises and homework are provided to reinforce learning.

What is the main topic of today's lesson?

• Dividing fractions

• Understanding shapes

• Adding and subtracting like units

• Multiplying numbers

What tool is used for counting in this lesson?

• Ruler

• Rec and Rec

• Abacus

• Calculator

In the Ten Frame Flash game, what should you focus on?

• The shape of the dots

• The size of the frame

• The number of missing dots

• The color of the dots

If a ten frame has 5 dots, how many are missing?

• 0

• 3

• 5

• 10

What is an example of an addition sentence for the number 7?

• 7 + 0 = 7

• 5 + 2 = 7

• 3 + 3 = 7

• 4 + 4 = 7

What is the first step in creating a subtraction sentence?

• Start with the smallest number

• Start with the whole number

• Start with zero

• Start with any number

What is a fact family?

• A group of numbers that are all even

• A family that loves math

• A set of numbers that are related through addition and subtraction

• A group of unrelated numbers

How do you break down the number 47 into tens and ones?

• 4 tens and 7 ones

• 40 tens and 7 ones

• 47 tens and 0 ones

• 0 tens and 47 ones

What is the result of adding 50 and 20?

• 60

• 90

• 70

• 80

When subtracting, what should you be careful about?

• The color of the numbers

• The subtraction sign

• The shape of the numbers

• The size of the numbers