Tuesday Homework

Anna wants to find 13- 8. She makes a ten to solve the problem.

13 -3= 10

10-5= 5

13-8=5

Is Anna right? Tell how you know. Circle the correct answer.

• Anna is right. She subtracted 3 from 13 to make a ten and then subtracted 5.

• Anna is right. 13- 8 = 5 and 10-5= 5

• Anna is wrong. She should have broken apart the 13 instead of breaking apart the 8.

• Anna is wrong. She should have subtracted 3 from 10 in the second step.

Luke makes 6 cards for his family. He makes 9 cards for his friends. He wants to find how many cards he has made in all. Fill in the model below to find 6 +9

• 5 + 1

  5

  15

• 5+4

  4

  14

• 6 + 1

  6

  16

• 5 + 1

  6

  16

Bella bakes 14 cookies. Her family eats 6 cookies. How many cookies are left? Make a ten to find 14 - 6. Complete each equation using a number from the box.

• 4

  6

  16

• 4

  8

  20

• 4

  2

  8

• 6

  2

  8

Jacob is trying to solve some equations. Tell if each equation shows how to make a ten to find the sum. Circle Yes or No for each equation.

• a. yes

  b. No

  c. yes

  d. no

  e. yes

• a. yes

  b. yes

  b. no

  c. yes

  d. no

• a.yes

  b. no

  c. no

  d. no

  e. no

• a. yes

  b. yes

  c. yes

  d.yes

  e.yes

Complete the open number line to find 14 - 7

• 8

  6

• 5

  4

• 7

  7

• 7

  4

Does the addition problem show a way to add 27 + 38? Circle Yes or No for each addition problem.

• Yes

  Yes

  Yes

  Yes

• No

  No

  yes

  No

• Yes

  No

  Yes

  Yes

• Yes

  Yes

  No

  No

Li reads 64 pages of her book on day one. On day two she reads 17 pages. Li says the sum of 64 and 17 is 71 pages. Explain what Li did wrong. How many pages did Li read in all?

• When using the vertical way she forgot to add one ten.

  The answer is 81.

• She forgot to take away ten. The answer is 61

• She used subtraction instead of addition. The answer is 81

• She was to add ten more the answer is 91.

Look at these base ten blocks

• 25+ 15=31

• 16+26= 41

• 16 + 25 = 41

• 15+16=31

Mr. Diaz has 49 red blocks and 33 blue blocks on a table. He asks his class to find the total number of blocks. Which addition problem shows a way to find 49 + 33? Circle all the correct answers.

• B and C

• B, F and E

• A B and C

• B only

George has 64 baseball cards. He gives 28 of them to his brother. Which method shows a way to find 64 - 28? Circle all the correct answers.

• A and C

• B and D

• B and E

• C and A