Vocab
A number sentence with an equals sign
Equation
30 + 6
36
Round 74 to the nearest tens place
70
+55
83
Mrs. Artz has 17 chickens. She wants to buy 25 more. How many will she have in all?
42 chickens
Changing the grouping of the addends does not change the sum
Grouping property of addition
43 + 7
50
Round 68 to the nearest tens place
70
+ 218
563
Mrs. Stevens has 3 jars of pickles. Each jar has 16 pickles in it. How many pickles does Mrs. Stevens have in all?
48 pickles
To figure a close answer
Estimate
75 + 8
83
Round 876 to the nearest hundreds place
900
+ 28
571
Ms. Massamillo has three kids. Each of them have 18 pairs of shoes. How many shoes are there all together?
54 pairs of shoes
Related addition and subtraction facts
Fact family
64 + 9
73
Round 452 to the nearest hundreds place
500
+169
842
About 500 miles
The sum of zero and any number is that number
Zero property of addition
41
Round 523 to the nearest hundreds place.
500
1,943
+2,387
4,330
Grace Academy has 321 students in the elementary school and 298 students in the upper school. How many students are there all together?
619 students