Show:
Break Apart
Compensation
Regrouping
3 or 4 Addends
100
Show how to break apart the ones to make a ten. Write the sum. 23 + 9 = ______
What is 32? (hold up your slate)
100
Show how to make one addend the next tens number. Write the new addition sentence. 37 + 25 = _____
What is 40 + 22 = 62 or 32 + 30 = 62?
100
When do you regroup in addition?
What is "You regroup when you have 10 or more ones in all"?
100
58 + 24 + 3 = ______
What is 85?
200
Show how to break apart the ones to make a ten. Write the sum. 48 + 5 = ______
What is 53? (hold up your slate)
200
Make one addend the next tens number and write a new sentence. 39 + 19 = _______
What is 40 + 18 = 58 or 38 + 20 = 58?
200
Draw quick picture to show if you regroup. Write the sum. 26 + 38 = _____
What is (hold up your slate) 64?
200
54 + 31 + 17 = ______
What is 102?
300
Break apart the addends to find the sum. 35 --> + 54 --> ---------
What is 80 + 9 = 89?
300
Which shows a way to find the sum for 41 + 29? a) 41 + 30 = 71 b) 40 + 20 = 60 c) 40 + 30 = 70 d) 50 + 30 = 80
What is c) 40 + 30 = 70?
300
Draw quick picture to show if you regroup. Write the sum. 54 + 25 = _____
What is (hold up your slate) 79?
300
44 + 23 + 16 = _______
What is 83?
400
Break apart the addends to find the sum. 43 --> + 29 --> ---------
What is 60 + 12 = 72?
400
Which shows a way to find the sum for 66 + 16? a) 60 + 16 = 76 b) 70 + 16 = 86 c) 60 + 12 = 72 d) 70 + 12 = 82
What is d) 70 + 12 = 82?
400
Suppose you are adding 27 and 68. Will you regroup? Explain.
What is "Yes, because 7 + 8 + 15 ones, which is enough to make 1 ten and 5 ones."?
400
58 + 17 + 23 + 31 = ______
What is 129?
500
Break apart the addends to find the sum. 37 --> + 45 --> ---------
What is 70 + 12 = 82?
500
How can you make an addend a ten to help solve an addition problem?
What is "I can take ones from one addend to make the other addend a tens number"?
500
23 + 39 ------- Show how to record regrouping in a vertical format.
What is (hold up your slate) 62?
500
15 + 42 + 30 +12 = ______
What is 99?