Addition
What is 89 + 75?
164
What is 165-98?
67
The answer to an addition question is called what?
Sum
What is estimation?
A reasonable guess
Estimate the sum:
8751 +876
8800 + 900 = 9700
What is 365 + 876?
1241
What is 1567 - 986?
581
When you see the word "about" in a question, you know to ....
Estimate
What is a strategy you can use to estimate?
Rounding
Estimate the difference:
1765 - 602
1200
What is 7765 + 9012?
16 777
What is 9976 - 1234?
8742
What is the answer to a subtraction question called?
When should you round up?
when the number is 5,6,7,8, or 9
Solve:
1765 - 654 + 65
1176
What is 98764 + 17654
116 418
What is 98765 - 87652?
11 113
What is the answer to a multiplication question called?
The product.
when should you round down?
when the number is 4,3,2,1, 0
You have 5 dollars and want to go to the candy story to buy some treats for you and your friends.
A chocolate bar is $1.06
4 airheads is $1.25
A bag of chips is $2.50
Do you have enough? Explain
You would have enough before tax but not after.
What is 987665105 + 2065?
987 667 170
What is 11111 - 2222?
8889
What is the answer to a division question called?
The qoutient.
Estimate the sum:
1986 + 7545 + 1875
2000 + 7500 + 1900 = 11 400
What strategy would you use to subtract these numbers? Why?
680 200 - 75 180
Answer will vary.