'Illustrated tens' presentation slideshows

State Standard: 1.NBT.4 Add within 100 a two-digit number using tens and ones.

State Standard: 1.NBT.4 Add within 100 a two-digit number using tens and ones. We will be able to add 2-digit numbers using regrouping by solving and illustrating given problems. I can justify my process. TSW Illustrate using tens and ones to add 2-digit numbers and identify the sum.

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