Rounding to Tens & Multiplying: Fun Challenges for 4th Graders

A bakery made 47 cookies. If they round to the nearest ten, how many cookies do they have? If they pack them in boxes of 10, how many boxes can they fill?

• Rounded cookies: 40, Boxes filled: 5

• Rounded cookies: 60, Boxes filled: 3

• Rounded cookies: 50, Boxes filled: 4

• Rounded cookies: 50, Boxes filled: 5

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

A farmer has 83 apples. He wants to round this number to the nearest ten. After rounding, if he sells 8 boxes of apples with 10 apples in each box, how many apples does he have left?

• 30

• 0

• 20

• 10

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

A toy store has 56 toy cars. If they round this number to the nearest ten and then multiply by 3 to find out how many toy cars they would have if they received 3 shipments, how many toy cars would that be?

• 200

• 180

• 150

• 120

Tags

CCSS.4.NBT.B.5

A school has 92 students. If they round this number to the nearest ten and then multiply by 2 to find out how many students are in two classes, how many students are there in total?

• 180

• 140

• 200

• 160

A library has 74 books. If they round this number to the nearest ten and then multiply by 4 to find out how many books they would have if they received 4 donations, how many books would that be?

• 320

• 280

• 240

• 300

Tags

CCSS.4.NBT.B.5

A gardener planted 39 flowers. If he rounds this number to the nearest ten and then multiplies by 5 to find out how many flowers he would have if he planted 5 times that amount, how many flowers would that be?

• 150

• 250

• 300

• 200

Tags

CCSS.4.NBT.B.5

A pet store has 68 fish. If they round this number to the nearest ten and then multiply by 2 to find out how many fish they would have if they received 2 shipments, how many fish would that be?

• 160

• 120

• 80

• 140

A restaurant has 45 chairs. If they round this number to the nearest ten and then multiply by 3 to find out how many chairs they would have if they bought 3 times that amount, how many chairs would that be?

• 120

• 90

• 180

• 150

A clothing store has 29 shirts. If they round this number to the nearest ten and then multiply by 4 to find out how many shirts they would have if they received 4 shipments, how many shirts would that be?

• 100

• 80

• 120

• 140

A candy shop has 85 candies. If they round this number to the nearest ten and then multiply by 2 to find out how many candies they would have if they received 2 shipments, how many candies would that be?

• 180

• 140

• 200

• 160

Tags

CCSS.4.NBT.B.5