Rounding Numbers
Addition Patterns
Decomposing
Regrouping/No Regrouping
Writing Related Equations
100

Round this number to the nearest 10:


42

40

100

fill in the blank:


Even addend + Even addend = __________

Even sum

100

decompose this number:

45

40 + 5 = 45

100

solve:

23 + 41 = __

64

100

what number goes in the blanks?


12 - __ = 3

__ + 3 = 12

9


12 - 9 = 3

3 + 9 =12

200

Round this number to the nearest 10:

58

60

200

Fill in the blank:


Odd addend + Even addend = ____________

Odd sum

200

decompose this number:

92

90 + 2 = 92

200

solve:

47 - 29 = __

18

200

what number goes in the blanks?


25 - __ = 9

__ + 9 = 25

16

25 - 16 = 9

16 + 9 = 25

300

Round this number to the nearest 100:


587

600

300

Solve using addition patterns:

(write the addition pattern AND the answer)


253 + 124 = _____

odd addend + even addend = odd sum

sum = 377

300

decompose this number:

340

300 + 40 + 0 = 340

OR

300 + 40 =340

300
solve:


452 + 469 = ___

721

300

find the missing number:

Jack has 5 marbles, he wants to collect a total number of 18 marbles. How many more marbles does Jack need to collect?

13

5 + 13 = 18

18 - 5 = 13

400

Round this number to the nearest 100:


235

200

400

what is the addition pattern:


434 + 234 = 668

even addend + even addend = even sum

400

what is this number:


400 + 50 + 3 = ?

453

400

solve:


562 - 259

303

400

find the missing number:

A school bus has 13 students on the bus, it can hold a total of  27 students. How many more students can the bus driver pick up to get to the total?

14

27 - 14 = 13

13 + 14 = 27

500

Round this number to the nearest 10 AND 100:


692

Rounded to 10: 690

Rounded to 100: 700

500

create an equation using this pattern:

make sure to SOLVE your equation!


odd addend + odd addend = ____ sum

answers will vary

500

what is this number:


200 + 3 = ?

203

500

solve:

301 + 709 =

1,010

500

find the missing number:

A library has 435 books in total. There are 278 books on the shelves right now. The rest are being borrowed, how many books are being borrowed?

157

435 - 278 = 157

278 + 157 = 435