Skip Counting NBT.2
Continue the counting pattern:
15, 25, 35, 45, _____, _____, _____, _____
55, 65, 75, 85
David is 17 years old. Steven is 15 years older than David. How old is Steven? Write an equation with a symbol for the unknown number. Solve the problem by using drawings to your thinking.
17 + 15 = _____
32
A bakery sold some cupcakes before lunch time. After lunch 35 more cupcakes were sold. If 76 cupcakes were sold in all, how many cupcakes were sold before lunch? Write an equation with a symbol for the unknown number and use drawings to show your thinking.
____ + 35 = 76
41
__________ , 36, _________
Ten less Ten more
26, 46
Karter scored 72 points in a video game. Kaitlyn scored 28 fewer points than Karter. How many points did Kaitlyn score? Write an equation with a symbol for the unknown number. Use drawings to solve the problem and show your thinking.
72 - 28 = ______
44
Some cookies were served at a party. The guests ate 38 cookies. After the party, 54 cookies were left over. How many cookies were there when the party began? Write an equation with a symbol for the unknown number. Use drawings to show your thinking.
_____ - 38 = 54
92
What number is 10 fewer than 89?
79
Mrs. Johnson's class earned 72 House points in the competition. Mrs. Smith's class earned 28 fewer points. How many points did Mrs. Smith's class earn?
Write an equation with a symbol for the unknown number. Use drawings to show your thinking.
72 - 28 = ____
44
Some students came to the fall festival at school. 57 more students came to the festival. Now there are 83 students at the festival. How many students came to the fall festival at first? Write an equation with a symbol for the unknown number. Use drawings to show your thinking.
_____ + 57 = 83
26
Continue the counting pattern:
22, 27, 32, 37, _____, _____, _____, _____
If the pattern continues, will the number 73 be a part of the pattern? Tell how you know.
42, 47, 52, 57
No, because the one's place will have a 2 or 7 in it.
Alice solved the problem 35 + 25 by adding 30 + 20 + 5 + 5. Is Alice's strategy correct? Explain why or why not.
Yes.
She decomposed the tens and ones.
There were 62 students in the gym. Some students left. If there are 23 student left, how many students left the gym? Write an equation with a symbol for the unknown number. Use drawings to show your thinking.
62 - ____ = 23
39
Continue the counting pattern:
14, 24, 34, 44, _____, _____, _____, _____
If the pattern continues, will the number 104 be a part of the pattern? Tell how you know.
54, 64, 74, 84
Yes, because the ten's place will have a 4 in it.
Harriet solved the problem 95 - 32 = ______ by writing "I know that I need to add 3 to the 2 to make 5. And I need to add 60 to the 30 to make 90. The answer is 63. Is Harriet's strategy correct? Explain why or why not.
Yes.
She counted up from 2 to 5 by adding 3, and then skip-counted by tens until she got to 95 by adding 6 tens. The answer is 63.
Henry read for 56 minutes on Thursday. Then on Saturday he read some more. He read for a total of 83 minutes both days. How many minutes did Henry read on Saturday? Write an equation with a symbol for the unknown number. Use drawings to show your thinking.
56 + ____ = 83
27