Vocabulary
Rounding
What is the number it is closer to?
When we round, we always look at the number to the ______ first
What is Right?
How much is a nickel?
What is 0.05?
Rows are in what direction
What is side-to-side?
Estimate the sum
345 - 168
What is 100?
Estimate
What is the number close to an exact number?
When rounding to the HUNDREDS, if the digit to the right is 5 or greater, the hundreds place
What is increases by one?
How much money do I have if I have 3 dimes, 2 quarters, 5 nickels, 4 pennies?
What is $1.09?
The product(s) in 3 x 5 = 15
What are 3 and 5?
Estimate the difference
83-15
What is 70?
Array
What is a set of objects arranged in rows and columns?
When we are rounding to the TENS, if the digit to the right is less than 5, the tens place
When you are told "how many" what operation do you do?
(HINT: Add or Subtract)
When the problem tells you "___ groups of ____" how do we multiply?
What is multiply groups by what is inside?
678 - 592 =
What is 86?
Compatible Numbers and when do we use them
What are numbers that are easy to add or subtract and end in 5 or 0?
What is 2-digit numbers?
When rounding to the HUNDREDS, what happens to the tens and ones places?
(HINT: Step 2)
What is they become zeros?
When you are asked "how many more" what operation do you do?
(Hint: Add or Subtract)
What is subtract?
How many rows and columns are in
X X X X X X
X X X X X X
X X X X X X
X X X X X X
What is 4 rows and 6 columns?
Round 167 to the nearest ten
What is 170?
Commutative Property of Multiplication
What is changing the order of the factors and still getting the same answer?
When we round to the TENS place, what happens to the hundreds and ones place?
(HINT: Step 2)
What is hundreds stays the same and ones turns into a zero?
If you are given rows, groups, shelves, we multiply these_____
(HINT: ___x___=____)
What is first?
10 groups of 9
What is 90?
10 X 9 = 90
Why does 5 x 4 = 20 and 4 x 5 = 20
(HINT: it is a property)
What is Commutative Property of Multiplication?