22 Unit 1-Add & Subtract

Samantha buys 2 bags of dog food for her dogs. One bag weighs 118 pounds. The other bag weighs 169 pounds.

How many pounds do both bags weigh?

Answer explanation

Altogether is a key word to let you know that you need to add.

Tags

CCSS.2.NBT.B.6

The table shows the number of shoes sold online in four months.

How many shoes were sold in January and March?

Answer explanation

Find the two months the question is asking about, and then add the numbers to find how many shoes were sold.

Tags

CCSS.2.NBT.B.7

The table shows the number of shoes sold online in four months.

In April, the Shoe Store sold 60 more shoes than in May. How many shoes were sold in May?

Answer explanation

If the amount of shoes sold in April was MORE than in May, you would need to subtract.

Tags

CCSS.3.OA.D.8

Kyran buys 4 packs of pens. Each pack has the same number of pens inside. After opening 3 packs, he has 12 pens. How many pens will Kyran have after he opens the fourth pack?

• 4

• 16

• 3

• 7

Answer explanation

Draw boxes for the packs that he has already opened and put lines in for the amount he has. This will tell you how many are in each pack.

Tags

CCSS.3.OA.A.3

There are 148 cookies and 264 cake pops at the bakery.

About how many treats are at the bakery? Round to the nearest ten.

• 150

• 412

• 410

• 260

Answer explanation

Add the two numbers together and then ROUND to the nearest ten

Jade is making key chains for each of her 4 family members. She is putting 16 beads on each key chain. She makes a table to show how many beads she has used so far to make 3 key chains.

The total number of beads Jade will use is equal to the number of beads on the first 3 key chains ____________ the amount for each key chain.

• plus

• minus

• multiplied by

• divided by

Answer explanation

To find how many beads are used in all, you would have to add.

Tags

CCSS.5.OA.B.3

Jade is making key chains for each of her 4 family members. She is putting 16 beads on each key chain. She makes a table to show how many beads she has used so far to make 3 key chains.

The total number of beads Jade will use is equal to the number of beads on the first 3 key chains plus ____.

• 4

• 15

• 16

• 18

Answer explanation

To find how many beads are used in all, you would have to add the amount already used PLUS the amount for ONE key chain.

Tags

CCSS.3.OA.A.3

Jade is making key chains for each of her 4 family members. She is putting 16 beads on each key chain. She makes a table to show how many beads she has used so far to make 3 key chains.

Jade will use ___ beads on her 4 key chains

• 16

• 53

• 54

• 64

Answer explanation

To find how many beads are used in all, you would have to add the amount already used PLUS the amount for ONE key chain.

Tags

CCSS.4.OA.C.5

Jordan is saving money to buy a game system that costs $168. He has saved $143 so far. Jordan rounds each of these numbers to the nearest ten to estimate how much more money he needs to save. He estimates that he needs to save $20 more to buy the game system.

Jordan made a mistake. What mistake do you think Jordan made while estimating?

• He ROUNDED DOWN the cost of the game system

• He ROUNDED UP the cost of the game system

Answer explanation

If Jordan rounded correctly, he would need about $170 and he has saved about $140, so he needs about $30 more.

Tags

CCSS.4.NBT.B.5

There are 268 fiction and 173 nonfiction books in the library.

How many more fiction books are there than nonfiction books in the library?

Answer explanation

How many more lets you know that you need to subtract.

Tags

CCSS.3.OA.D.8