Bob went to the store and bought 30 watermelons. He ate 21 of them (and felt really SICK)! How many watermelons does Bob have left?
What is 9?
200
Use a number line to solve:
67 + 32 =
What is 99
200
Use number line to solve
395 + 122 =
What is 517?
200
Use break apart to find
87-24 =
What is 63?
200
Use friendly numbers to find:
436 - 127 =
What is 309?
200
Bob, Bobbi and Billy Bob were playing cars. Bob had 9 cars, Bobbi had 32 cars and Billy Bob had 21 cars. How many cars did they have all together?
What is 62?
300
Use regrouping to solve
34 + 19 =
What is 53
300
Use regrouping to solve
197 + 795 =
What is 992
300
Use the number line to find
82-11=
What is 71?
300
Use break apart to solve:
979 - 163 =
What is 816?
300
Bob had 423 rocks in his pocket. The sheer weight of the rocks caused a hole in his pockets and 132 of them fell out. Use a number line to figure out how many rocks Bob still has in his pocket.
What is 291?
400
Use break apart to solve
19 + 82 =
What is 101?
400
Estimate
329 + 171 =
What is 500?
400
Use regrouping to find
53-19 =
What is 34?
400
Use regrouping to solve:
991 - 182 =
What is 809?
400
Bob's family went on vacation. They traveled 142 miles on one day, 523 miles another day. Estimate how many miles they traveled all together.
What is 660?
500
Use the number line to solve
32 + 82
What is 114?
500
Use regrouping to solve
893 + 127 =
What is 1,020?
500
Use friendly number to find
36-28 =
What is 8?
500
Use a number line to solve
1000-321 =
What is 679?
500
Bob had wanted to buy a car for $1.29 and a bike for $3.99. Bob has $5.00 Does he have enough money? (Hint: Round using compatible quarter numbers)
What is NO! The car and bike together cost about $5.25