7-1, 7-2, 7-3, 7-4 Quick Check

Find the product

• 3,400

• 34

• 340

• 34,000

Tags

CCSS.4.NBT.B.5

Find the product.

• 640

• 800

• 8,400

• 840

Tags

CCSS.4.NBT.B.5

Find the product

• 630

• 990

• 930

• 690

Tags

CCSS.4.NBT.B.5

When rounding if the number nextdoor is a 0, 1, 2, 3, or 4

• you round up

• keep it the same or round down

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

When rounding if the number nextdoor is a 5, 6, 7, 8, or 9

• you round up

• keep it the same or round down

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Compatible numbers are

• numbers that are close to the actual numbers and are easy to solve in your head

• odd numbers that you multiply together to get an even number

• even numbers that you multiply together to get an odd number

• numbers that have multiple factor combinations

Tags

CCSS.4.NBT.B.5

When using mental math to multiply, the steps you take in your head are

• add the numbers together then add the zeros

• divide the numbers then add the zeros

• solve the basic fact first then don't add any zeros

• solve the basic fact first then add the number of zeros

Tags

CCSS.3.OA.A.1

How many zeros are in the product of 60 × 90? Explain how you know.

Tags

CCSS.5.NBT.A.2

Solve using mental math. 40 x 30 =

Tags

CCSS.3.OA.C.7

Solve using mental math. 90 x 70 =

Tags

CCSS.5.NBT.B.5