Box Method: Two-Digit Multiplication

• Add the numbers together.

• Break each number into tens and ones.

• Subtract the smaller number from the larger number.

• Divide the numbers by 2.

Answer explanation

The first step in the box method is to break each number into tens and ones. For 23, this means 20 and 3; for 45, it means 40 and 5. This allows for easier multiplication of each part.

Tags

CCSS.4.NBT.B.5

• 408

• 412

• 384

• 396

Answer explanation

Using the box method, break down 34 into 30 and 4, and 12 into 10 and 2. Calculate: (30x10) + (30x2) + (4x10) + (4x2) = 300 + 60 + 40 + 8 = 408. Thus, the product of 34 and 12 is 408.

Tags

CCSS.4.NBT.B.5

Tags

CCSS.4.NBT.B.5

• 1363

• 1323

• 1366

• 1373

Tags

CCSS.4.NBT.B.5

Tags

CCSS.4.NBT.B.5

What goes in box C?

Tags

CCSS.4.NBT.B.5

Which number goes where the grey square is?

• 7

• 10

• 12

• 8

Tags

CCSS.4.NBT.B.5

What multiplication problem is the student solving in the box?

• 40 x 6 x 50 x 3

• 406 x 503

• 46 x 53

Answer explanation

The student is solving 46 x 53, which can be derived from the context of the problem. The other options involve larger numbers or different combinations that do not match the problem being solved.

Tags

CCSS.4.NBT.B.5