2-3 digit Addition with regrouping

How well do you know how to add with regrouping?

• 4

  I'm great!

• 3

  I can pass a quiz.

• 2

  I get some right.

• 1

  I don't know what to do.

What do I add first? 34

+ 17

• I add 4+7 first

• I add 3+1 first

• I add 3+4

• I add 1 + 7

Can I use my fingers to double check my adding?

Draw the sum.

Add 718+67=

• 718

• 751

• 785

• 758

Add 342+65=

• 277

• 722

• 407

• 470

Add 87+45=

• 123

• 132

• 143

• 142

Add 267+123=

• 903

• 930

• 390

• 423

Add 478+286=

• 746

• 664

• 674

• 764

Add 907+124=

• 931

• 1031

• 1091

• 10031