덧셈 단원 종합

D.1D.2Add.

1. 1
   890

   +103
2. 2
   287

   +412
3. 3
   577

   +420
4. 4
   618

   +260
5. 5
   608

   +359
6. 6
   606

   +903
7. 7
   373

   +998
8. 8
   206

   +875

D.3Find the number that goes in each box.

1. 9
   $\boxed{}+156=$ $239$
2. 10
   $\boxed{}+164=$ $527$
3. 11
   $328+\boxed{}=$ $833$
4. 12
   $\boxed{}+269=$ $798$

D.4Add.

1. 13
   $270+92+11=$ 
2. 14
   $65+742+48=$ 
3. 15
   $158+11+549=$ 
4. 16
   $899+62+10=$ 

D.5Add.

1. 17
   7818

   +7467
2. 18
   3565

   +4588
3. 19
   3361

   +1687
4. 20
   6231

   +8171

D.6Fill in each box.

1. 21
   $78+34=$ $34+\boxed{}$
2. 22
   $30+82=$ $82+\boxed{}$
3. 23
   $(18+32)+15=$ $18+(\boxed{}+15)$
4. 24
   $54+94=$ $94+\boxed{}$

D.1D.2Add.

1. 1993
2. 2699
3. 3997
4. 4878
5. 5967
6. 61,509
7. 71,371
8. 81,081

D.3Complete the Addition Sentence

1. 983
2. 10363
3. 11505
4. 12529

D.4Add Three Numbers

1. 13373
2. 14855
3. 15718
4. 16971

D.5Add 4-Digit Numbers

1. 1715,285
2. 188,153
3. 195,048
4. 2014,402

D.6Properties of Addition

1. 2178
2. 2230
3. 2332
4. 2454