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Add Tens Color by Number — pencils

Interactive worksheet with auto-grading, instant feedback, and printable PDF.

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Grades 1–2MathInteractive · Printable

Aligned to1.NBT.C.42.NBT.B.5

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2 Common Core standards

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About this worksheet

With 2-Digit Addition by 10's Color by Number, the more problems students get right, the more of the picture appears. Students solve each problem, match the answer to the color key, and a hidden picture appears region by region. It builds mental math by adding whole tens. Built for Grades 1–2 and aligned to 1.NBT.C.4, 2.NBT.B.5. Print it for morning work and centers or assign the self-checking interactive version for home — each download includes the PDF and the digital answer-key version.

Curriculum

Common Core standards covered

1.NBT.C.4

Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

2.NBT.B.5

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

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