Addition
23+47
70
67-28
3x7
21
24/6
4
Round 94 to the nearest 10
90
Add 356+243
599
Subtract 400-219
181
Multiply 6x7
42
Divide 48 by 6
8
Round 367 to the nearest 100
400
The 2 numbers being added are?
ADDENDS
Which words in the story problem tell us that we are subtracting?
Valor brought 98 cookies to school. His class ate 45 of them. How many cookies does Valor have left?
"have left" and "ate"
Product
Which words in the story problem tell us that we're dividing?
Trevaris split his 56 pieces of candy into 8 equal piles. How many pieces of candy are in each pile?
"into __ equal piles" and "how many in each pile"
5 or more, let it ______. 5 or less, let it ______.
Soar, rest
Lillie completed 128 math problems. Emery completed 257 math problems. How many math problems did they collect in all?
485 math problems
Ms. Anderson ordered 356 pizzas for the 3rd grade pizza party. After the party, she was left with 97 pizzas. How many pizzas were consumed during the pizza party?
259 pizzas
Alex passed back papers to 9 students in the class. Each student had 7 papers when he was done. How many papers did Alex pass back?
63 papers
Sawyer wants to make sure he spends 70 minutes a week playing outside. If he plays outside every day of the week, how many minutes will he spend outside each day?
10 minutes
1. What does it mean to estimate with rounding?
2. Give an example of a situation where estimating with rounding helps you find an answer quicker.
Answers should be similar to...
Rounding to numbers that are easier and quicker to work with.
Ex: Finding the approximate number of students in the school by adding an estimated number of students per grade level.
1,432+559
1,991
1,207-639
568
__x8=72
9
81/__=9
9
Ms. Hanson went on a road trip. She drove 178 miles the first day, 343 miles the second day, and 225 miles the third day.
Round her daily miles to the nearest 10 and add for the total estimated miles.
740 miles