Number Sense Addition and Subtraction Fluency

What is the difference between 8.6 and 2.14?

• 3.6

• 5.84

• 6.46

• 12.8

Kamal has a checking account balance of $45.75. He spend $21.89 dollars and claims that his balance is $24.55. What mistake did Kamal make in his calculation?

• He did not make a mistake because 45.75 - 21.89 is equal to 24.55

• He did not subtract correctly when he lined up his decimals

• He should have added instead of subtracting from his balance

• He forgot to carry his one

300 + 240

• 540

• 500

• 440

Which expressions shows:
5 more than a number z

• 5 - z

• 5 x z

• z + 5

• z - 5

190 909 = ​ (a)   +​ (b)   + ​ (c)   +​ (d)  

• 100000

• 90000

• 900

• 9

• 909

• 9000

190 - 100

• 90

• 190

• 100

• 10

• exactly in the middle

• 20

• 0

• exactly in the middle

• 80

• 60

• exactly in the middle

• 70

• 0

• exactly in the middle

• 200