Vocabulary
Hands On: ADD!
Choose a Way to Add
Estimate the Sum
Guess and Check
100
When I estimate, I round each addend to the nearest _________.
Ten.
100
23 + 38 =
61
100
Would you use mental math or paper and pencil to add 55 + 27?
Use paper and pencil because you have to regroup.
100
Round 67 to the nearest ten.
70
100
Mary bought 75 pieces of candy. Which two bags did she buy?
The small and jumbo bags.
200
I can do all of the steps in my head. I will use ________ _______.
Mental Math.
200
58 + 38 =
96
200
Would you use a calculator or mental math to solve 29 + 40?
Use mental math because you are adding 4 tens.
200
Round 25 to the nearest ten.
30. Remember the rule! "5 or more, round UP!"
200
George got 49 pieces of candy. Which two bags did he get?
The small and large bags.
300
I need to write down the problem to solve it. I will use the ______ and _______ method.
Paper and Pencil.
300
44 + 37 =
81
300
True or False? Using paper and pencil is a better way to do math than mental math.
False. Both are good ways to solve a math problem. Mental math saves time--especially if you get the right answer! :)
300
Round each addend to the nearest ten and then estimate: 72 + 11 = _______
70 + 10 = 80
300
I want to have enough candy for 36 people. Which two bags should I get?
I should get the small and medium bags.
400
I can solve problems by _________ and then checking my answer to see if it is right.
Guessing.
400
17 + 43 + 26 =
86
400
Choose a method to add and then solve the problem: 52 + 40.
Answers will vary.
400
Round each addend to the nearest ten and then estimate: 24 + 25 = ____
20 + 30 = 50
400
My mom told me to get her 94 pieces of candy for the trick-or-treaters this year. Which bags should I buy?
I should get the large and jumbo bags.
500
I can _________ to find out about how many there are in all.
Estimate.
500
36 + 24 + 39 =
99
500
Choose a way to add and then solve the problem: 25 + 57
Answers will vary.
500
Round each addend to the nearest ten and then estimate: 41 + 44 = _________
40 + 40 = 80
500
I went to the store and bought three bags of candy. There was enough candy for 70 people! Which THREE bags did I buy?
The small, medium, and large bags.
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