Subtraction of 3-Digit Numbers by Regrouping Review

What subtraction equation is represented by the base 10 blocks model?

• 565-784

• 584-767

• 775-595

• 767-584

Answer explanation

Look at the base 10 blocks model from left to right count the hundredsLook at the base ten blocks model from left to right count the hundreds blocks, tens, and ones(Match them up with place value).

767-584 is correct because 767 is represented with 7 hundends blocks, 6 tens, and 7 ones on the left. 584 is the second number because 5 hundred blocks, 8 tens, and 4 ones are shown on the right side of the minus sign.

Tags

CCSS.2.NBT.B.7

Show your thinking and label the below number to solve the problem 547-268.

(if you need to draw a second number line, you can) :)

Answer explanation

The answer is 279. Use skip counting, should have two -100, six -10's, and eight -1's drawn to subtract 268 from 547.

Tags

CCSS.5.NBT.B.7

• 365

• 430

• 475

• 370

Answer explanation

*Don't forget to regroup and write the numbers as addition problems :)

Tags

CCSS.2.NBT.B.7

• 269

• 155

• 186

• 245

Answer explanation

The correct answer is 155.

812= 8 Hundreds, 1 Ten, and 2 Ones.

657= 6 Hundreds, 5 Tens, and 7 Ones.

You are subtracting the 6 Hundreds, 5 Tens, and 7 Ones from 8 Hundreds, 1 Ten, and 2 Ones.

• * You Must regroup the ones by borrowing from the tens and regroup the ones by borrowing from the tens and regroup the tens by borrowing from the hundreds place.

Tags

CCSS.5.NBT.B.7

Which expanded form equation equals 326?

Answer explanation

The expanded form equation shown is correct.

500+60+3 = 563 &

200+30+7 =237

You regroup the 60 in 500 + 60 + 3 to 50, and the 3 becomes 13 as shown because a 10 is borrowed from 60.

Tags

CCSS.2.NBT.A.3

(you may use any of the three strategies we

learned to solve the following problem)

Mrs. Cook has 878 apples. She gives Mrs. Taylor 289 apples.

So, Mrs. Cook has (a)   left.

Answer explanation

Equation from problem

878-289=

The 8 in the ones place of 878 is regrouped as an 18.

The 18 that is now in the ones place makes the 7 in the tens place get regrouped as a 6.

• * can't subtract 8 from 6.

• The 6 gets regrouped as a 16, and the 16 now in the tens place makes the 8 in the hundreds place gets regrouped as a 7.

• Then subtract :).

So the answer is... 589

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2