Grade 1’s: Equality vs. Inequality
Today I would like you to practice identifying if an equation is equal or not. For example, you’re used to seeing equations like 5+5=10 and 8-5=3. Now pretend that the = sign is like a wall. When we are looking to see if things are equal in math equations, we want to know if the value of the numbers on each side of the = sign wall is the same. For example, for the equation 5+5=10. On the left side, there is 5+5, we know that equals 10. On the right side we have the number 10. So on each side of the wall the value is the same. Again, with 8-5=3. Pretend the = sign is a wall. On the left side of the wall we have 8-5, which we know equals to 3. On the right side of the wall we have 3, so on each side of the wall the value is the same. In both of these situations, there is an equality.
Now what about 4+5=10? On the left side of the wall we know 4+5=9. So on the left side of the wall, the value of the numbers is 9. On the right side of the = sign wall is 9. Is this equation equal? The answer is no. 4+5 does not equal 10. The values on each side of the wall are unequal so there is an inequality. For this equation would we show that it’s an inequality by using this sign: ≠.
We can also do this with simple equations too.
If I have 5+5=6+4 is this correct? Should there be a = sign or a ≠ sign?
On the left side of the = sign wall there is 5+5 which we know equals 10. On the right side there is 6+4 which equals 10 too. So is there an equality or inequality? There is an equality because both sides equal 10.
Try these worksheets and see if you can figure out if you use a = sign or a ≠ sign!
Worksheets:
Intro Equality vs. Inequality worksheet
Equality vs. Inequality Simple Equations
Grade 2’s: Rounding
Today we will practice rounding to the nearest ten. What is rounding? Rounding is when we take a number and find the closest number 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 that it is next to. We do this when we estimate a measurement, or need a general idea of how much there is of something or how long it is. For example, if I have the number 26 I have to think, what numbers is it between or close to (that are a multiple of ten)? Well on a number line 26 is between 20 and 30. Now what is the half way point between 20 and 30?
20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30.
25 is right in between. Now I have to think, is 26 below or above, before or after 25? It is above 25, because 26 is more than 25, it comes after it on the number line. On the number line you can see that 26 is closer to 30. So if I was rounding to the nearest ten, 26 would be rounded to 30.
We can also round to the nearest 100th. For example if I have the number 123. I would have to think, is it closer to 100 or 200? On a number line it would be closer to 100 rather than 200.
Watch this video to get a full explanation of what rounding is and how to do it!
Here is a diagram that might help you too.
Rounding to Nearest 10th and 100th Diagram
Now I want you to try it. Here are some worksheets to try. If you don’t have a printer, see if you can just do them verbally. Use the number lines to help you if you need it!