Math Unit 2 Review- Addition

Vocab

100

A number sentence with an equals sign

Equation 

200

Changing the grouping of the addends does not change the sum

Grouping property of addition

300

To figure a close answer 

Estimate

400

Related addition and subtraction facts

Fact family

500

The sum of zero and any number is that number

Zero property of addition  

Mental Addition

100

30 + 6

36

200

43 + 7

50

300

75 + 8

83

400

64 + 9

73

500

33 + 8

41

Rounding

100

Round 74 to the nearest tens place 

70

200

Round 68 to the nearest tens place 

70

300

Round 876 to the nearest hundreds place 

900

400

Round 452 to the nearest hundreds place

500

500

Round 523 to the nearest hundreds place.

500

Column addition

100

  28 

+55

83

200

   345

+ 218

563

300

 543

+ 28

571

400

  673

+169

842

500

  1,943

+2,387

4,330

Word problems

100

Mrs. Artz has 17 chickens. She wants to buy 25 more. How many will she have in all?

42 chickens 

200

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 

300

Ms. Massamillo has three kids. Each of them have 18 pairs of shoes. How many shoes are there all together?

54 pairs of shoes 

400

Mrs. Stanley drove 320 miles on her trip. After she took a rest, she drove 197 more miles. About how many miles did she drive in all?

About 500 miles

500

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