2-digit Addition
20 + 30 + 50 = _____
100
A pet store sold 318 bags of dog food and 167 bags of cat food. How much pet food was sold in all?
318 + 167 = 485 bags of food
Find the next 3 numbers:
712, 722, 732, _____, _____, _____
742, 752, 762
Count by 10's
How many tens makes 100?
10 tens = 100
What is the value of 1 hundred, 10 tens, and 20 ones?
100 + 100 + 20 = 220
Mrs. Gerrish made 22 copies in the morning, 22 copies in the afternoon, and 18 copies before she went home. How many copies did she make that day?
22 + 22 + 18 = 62 copies
Mariam got $145 from her uncle during Eid and $132 from her grandfather during Eid. How much money did Mariam get during the Eid holiday?
145 + 132 = $277
Find the next 3 numbers in the pattern:
548, 448, 348, ____, _____, _____
248, 148, 48
Count by 100's
What number is 4 hundreds and 8 tens?
400 + 80 = 480
What is the value of 1 hundred, 0 tens, and 18 ones?
100 + 0 + 18 = 118
23 + 18 + 27 + 5 = _____
73
There were 448 people at a mall. Then 100 more people came to the mall. How many people are there now?
448 + 100 = 548 people
What numbers come next in the pattern?
821, 811, _____, _____
801, 791
True or False?
2 hundreds and 13 ones > 2 hundreds and 6 tens
False
2 hundreds and 13 ones = 213
2 hundreds and 6 tens = 260
213 < 260
True or False?
767 < 776
True, 6 tens is less than 7 tens
What is the sum of 15, 72, 35, and 2?
15 + 72 + 35 + 2 = 124
Mrs. Gerrish bought 126 coffee flavors to try! By the end of the week she had tried 87 flavors. How many flavors does she have left to try?
126 - 87 = 39 flavors
What is the rule for the pattern?
615, 605, 595, 585
Count back by 10's
True or False?
5 hundreds, 3 ones, and 1 ten = 513
500 + 3 + 10 = 500 + 10 + 3 = 513
Fill in the missing values:
300 + ____ + 12 = 352
300 + 40 + 12 = 352
Mrs. O'Brien had 100 base ten blocks. She had 25 on one desk, 15 on another desk, 20 on another desk, and the rest on the back table. How many base ten blocks were on the back table?
25 + 15 + 20 + ? = 100
? = 40 blocks
Adam says you need to regroup the hundreds and tens to solve this problem:
407 - 188
Is Adam right? How do you know? Show or explain.
407 - 188 =
(300 + 100 + 7) - 188
(300 + 90 + 17) - 188
Yes, you need to regroup both places to have enough value in each place to subtract.
Find all the missing numbers in the pattern.
322, 312, ______, _____, 282, _______, 262
302, 292, and 272
Count back by 10's
Fill in the blanks:
114 has _______ hundred(s)
114 has _______ tens
114 has _______ ones
114 has 1 hundred
114 has 11 tens
114 has 114 ones
How can you regroup to solve 230 - 155?
230 = (200 + 30 + 0) - 155
(200 + 20 + 10) - 155
(100 + 120 + 10) - 155
Regroup the hundreds and tens to give each place enough value to subtract.