Academic Language
Define sum
The sum is the answer to an addition problem
Solve: 32+50
82
Solve: 89-52
37
What is 27 rounded to the nearest tens place?
30
What is a reasonable estimate for 298+103?
300+100=400
Define addend
An addend is a number that is added to another
Solve: 67+29
96
Solve: 694-321
373
What is 42 rounded to the nearest tens place?
40
What is expanded form of 346?
300+40+6
Define pattern
A pattern is an ordered set of numbers or objects.
Something that repeats.
A way to predict what comes next.
Solve: 125+771
896
Solve: 64-39
25
What is 165 rounded to the nearest tens place?
170
What is a compatible number?
A number that is easy to compute in your head
A "friendly" number
What is the Commutative Property of Addition?
You can add two or more numbers in any order and get the same sum.
4+3=7
3+4=7
Solve: 454+236
690
Solve: 331-192
139
What is 378 rounded to the nearest hundreds place?
400
Estimate then solve 58+21=
60+20=80 OR 55+20 =75
58+21= 79
What is the identity property of addition?
The sum of any number and 0 is that number.
Solve: 852+279
1,131
Solve: 875-796
79
What is 1,321 rounded to the nearest hundreds place?
1,300
Estimate then solve: 379+211=
380+200=580 OR 400+210= 610
379+211=590