IXL | Use models to add three-digit numbers - regroup ones | 2nd grade math

or

The blocks show

129

+

322

.

129

322

You could regroup to have fewer than 10 tens and 10 ones. How many hundreds, tens, and ones would you have if you regrouped?

hundreds, tens, and ones

Complete the addition sentence.

129

+

322

=

ref_doc_title.

or

Learn with an example

question

The blocks show

628

+

119

.

628

119

You could regroup to have fewer than 10 tens and 10 ones. How many hundreds, tens, and ones would you have if you regrouped?

hundreds, tens, and ones

Complete the addition sentence.

628

+

119

=

solution

Use the blocks to find

628

+

119

.

First, count the hundreds, tens, and ones blocks.

6

hundreds

,

2

tens

, and

8

ones

1

hundred

,

1

ten

, and

9

ones

There are 7 hundreds blocks, 3 tens blocks, and 17 ones blocks in all.

Regroup 10 of the ones as 1 ten.

There are 7 ones left over.

You now have one more ten. That makes 4 tens in all.

So, there are 7 hundreds, 4 tens, and 7 ones after you regroup. This is the same as

747.

628

+

119

=

747

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Not feeling ready yet? These can help:

DD.14Use models to add two-digit numbers - with regrouping

S.4Use models to add three-digit numbers - without regrouping