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1nbt4 Worksheets

Number and Operations in Base Ten Use place value understanding and properties of operations to add and subtract. 4Add 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.

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1nbt4 Worksheets - Adding Multiples of Ten worksheet

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Adding Multiples of Ten

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Add a 2-digit number and a multiple of ten within 100 (e.g., 34 + 20).
Use place value to add tens to a number while keeping the ones digit the same (e.g., 57 + 30 = 87).
Solve vertical (stacked) addition problems without regrouping when adding tens.

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1nbt4 Worksheets - Adding Multiples of Ten (Horizontal) worksheet

Load up one problem at a time! Ideal for projectors, tablets and computers.

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Adding Multiples of Ten (Horizontal)

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Add a 2-digit number and a multiple of ten within 100 (e.g., 34 + 20).
Use place value to add tens to a number by changing only the tens digit (ones stay the same).
Count on by tens from a 2-digit number to find the sum (skip-counting by 10s).

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1nbt4 Worksheets - Adding Within 100 worksheet

Load up one problem at a time! Ideal for projectors, tablets and computers.

Create a set of flash cards.

Create a distance learning assignment.

Distance Learning

Create a new worksheet.

Create New Sheet

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Adding Within 100

Add two numbers up to 100 to find the total.
Use carrying (regrouping) when the ones add up to 10 or more.

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1nbt4 Worksheets - Adding Within 100 (horizontal) worksheet

Load up one problem at a time! Ideal for projectors, tablets and computers.

Create a set of flash cards.

Create a distance learning assignment.

Distance Learning

Create a new worksheet.

Create New Sheet

Magnify worksheet preview

Select a Worksheet >

Pin It

Adding Within 100 (horizontal)

1nbt4

Add two numbers up to 100 to find the total.
Practice adding when you need to trade 10 ones for 1 ten (carrying).
Practice adding two-digit numbers with and without carrying
Solve addition problems where the sum stays within two digits (no answer over 100)
Work with a mix of two-digit plus two-digit and two-digit plus one-digit problems

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