Unit 1 Review
Presentation
•
Mathematics
•
4th Grade
•
Hard
Mary Burgess
FREE Resource
19 Slides • 0 Questions
1
Unit 1 Review
Let's talk about all that we have learned!
2
3
Ten times rule
Every time you move to a larger place value, the value gets larger by 10.
If you move from the tens place to hundreds place, the hundreds place is 10 times larger than the tens.
If you move from the tens place to thousands place, the thousands place is 100 times larger than the tens, because 10 x 10 = 100.
4
Comparing Numbers
When comparing numbers, ALWAYS look at the greatest value first.
In this image, the largest value is the hundred thousands place.
Keep working your way down until you get two numbers that have different values.
The first set of numbers has a 5 in the hundreds place and the second set of numbers has a 4 in the hundreds place, so the first number is GREATER!
5
6
7
8
9
Rounding
Box your target number (what place value are you rounding)
Underline your right neighbor
If your neighbor is 5 or more, RAISE YOUR TARGET SCORE
If your neighbor is 4 or less, LET YOUR TARGET REST (target stays the same)
Everything in front of the target stays the same, everything behind the target turns to zeros
10
Key words for rounding
If a problem says words like "about", "estimate", "nearest", etc, it means that you will need to round the number.
It doesn't want the exact number.
11
12
13
Adding Numbers
Follow STANDARD ALGORITHM
Add the ones place first, then tens place, then hundreds place, and so on...
Remember the carrying rule: IF YOU HAVE 10 OR MORE, GO NEXT DOOR!
14
Subtracting Numbers
Follow STANDARD ALGORITHM
Start subtracting from the ones place, then the tens, then hundreds, and so on..
If you don't have enough in your top number, go next door and borrow
15
16
Adding or Subtracting Change
ALWAYS line up the decimal point when adding or subtracting money
Everything in front of the decimal is whole dollars.
Everything behind the decimal is the change.
17
Cups and Ounces
There are 8 ounces in a cup.
1 cup is = to 8 ounces
Another way to write ounces is "oz". (Example: 8 oz = 1 cup)
18
19
Capacity
There are 4 quarts in a gallon
There are 2 pints in each quart (so 8 pints in a gallon)
There 2 cups in each pint (so 16 cups in a gallon)
There are 8 oz in each cup (so 128 oz in a gallon)
Unit 1 Review
Let's talk about all that we have learned!
Show answer
Auto Play
Slide 1 / 19
SLIDE
