Properties/ Vocabulary
Which addition property is shown in these equations?
(4+3)+8 = 15
4+(3+8)=15
Associative (Grouping) Property of Addition
Round 38 to the nearest ten
40
What is the rule called for addition compensation?
How do you perform this form of compensation?
Riding hood.
Whatever you do to one number, you have to do the opposite to the other number.
What is the rule called for subtraction compensation?
How do you perform this type of compensation?
Sibling rule
Whatever you do to one number, you have to do the same to the other
William puts $383 into his bank account. Now he has $595 in his bank account? How much money did William have in his bank account to start?
$212
Which addition property is shown in these equations?
34 + 52 = 86
52 + 34 = 86
Commutative (Order) Property of Addition
Round 779 to the nearest hundred
800
Solve this problem USING COMPENSATION. Show your work.
57+24 = _________
81
Solve this problem USING COMPENSATION. Show your work.
61 - 28 = __________
33
Danny calculated 357 - 102 = 255. How could he check his answer? Is his answer correct?
A. Subtract 357-100=257. His original answer was correct.
B. Add 102+255=357. His original answer was correct.
C. Add 102+357=459. His original answer was incorrect.
D. Subtract 255 - 102 = 153. His original answer was incorrect.
B. Add 102+255=357. His original answer was correct.
Which addition property is shown in these equations?
29+0=29
35+0=35
63+0=63
Identity (Zero) Property of Addition
Round 89 to the nearest hundred
100
Solve this problem USING COMPENSATION. Show your work.
41 + 26 = __________
67
Solve this problem USING COMPENSATION. Show your work.
92 - 19
73
Tori earns $227 this week. Now she has $569. How much money did Tori have to start?
$342
When you ___________, you can use the multiple of ten or hundred that is nearest to a number.
Round
Round 176 to the nearest ten
180
Solve this problem USING COMPENSATION. Show your work.
396+222 = _________
618
Solve this problem USING COMPENSATION. Show your work.
771 - 192 = __________
579
Alfi drives 184 miles on Monday. He drives a total of 391 miles on Monday and Tuesday. How many miles did he drive on just Tuesday?
207 miles
The _____________ is the number that you are trying to make friendly in a subtraction equation.
Subtrahend
Round 805 to the nearest hundred
800
Solve this problem USING COMPENSATION. Show your work.
712 + 196 = __________
908
Solve this problem USING COMPENSATION. Show your work.
981 - 106 = _________
875
Becky added 273 + 416 and got 688. Then she checked her answer by adding 688 + 416. What error did Becky make? Was the sum she found for the original problem correct?
The error that she made was when she related addition and subtraction was that she did not subtract the sum first.