3 Digit Addition - Standard Algorithm
3-Digit Addition: Count On (Number Line)
3 Digit Addition: Place Value
Subtraction
Random
100
What place value do you always start with when you use the standard algorithm to add?
The ones place
100
Add 56 + 25. Use the count on strategy on the number line.
81
100
467 + 5 is the same as: A) 4,675 B) 400 + 60 + 12 C) 400 + 675
B) 400 + 60 + 12
100

25-14=

11
100
220 + _____ = 760
540
200
Add 35 + 27 using the standard algorithm.
Must show regrouping. Answer: 62
200
Add 125 + 7 using the count on strategy.
132
200
Add the places to figure out the total. 45 + 224 ______ + ______ + _______ = ______
200 + 60 + 9 = 269
200

31-10=

21

300
Add 127 + 329 using the standard algorithm.
Must show regrouping. Answer: 456
300
Add 145 + 128 using the count on strategy.
273
300
Add the places to figure out the total. 285 + 41 ______ + ______ + ________ = _______
200 + 120 + 6 = 326 Or 300 + 20 + 6 = 326
300

41-17=

24

300

656-244=

412

400
Add 264 and 171 using the standard algorithm. Which place value or values required regrouping?
Must show regrouping. Answer: 435. Place value that required regrouping - 10's.
400
Add 225 + 182 using the count on strategy.
407
400
Add the place values to figure out the total. 127 + 269 _____ + ______ + ______ =
300 + 80 + 16 = 396 Or 300 + 90 + 6 = 396
400

62-43=

19

400

451-222=

229

500
Add 275 and 337. Which place value or place values require regrouping?
Answer: 612. The ones and tens place require regrouping.
500
Add 281 + 136 using the count strategy.
417
500
Add the places to figure out the total. 268 + 157 _____ + _____ + ______
300 + 110 + 15 = 425 Or 400 + 20 + 5 = 425
500

60-27=

33

500

320-168=

152

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