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# Number & Operations in Base Ten

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• Use this crossword to review place values.
• Using golden bead Montessori place value to solve problems.
• Thirty questions for a game illustrating place value to ten thousands. Children read the number they have and ask who has another number. May use with abcteach's Place Value Ten Thousand Tally Chart and Game Pieces.
• "I have - Who has?" Practice the numbers 1-999 with this place value game. Includes hundreds place and numbers up to 999.
• "I have - Who has?" Practice the numbers 1-999 with this place value game. (Includes hundreds place and numbers up to 999).
• Place value chart game (hundreds).
• Who has 2 tens and 5 ones? Develop listening skills, practice numbers 1-99, and practice tens and ones place values with this all-class game.
• Place value chart game with decimals.
• A place value to ten-thousands chart with game pieces. May be used with abcteach's game questions for place value, "I have...Who has..."
• Chart and pieces for place value game.
• A game for 2-4 players. Lay cards on a mat in ones, tens, hundreds and thousands places. Compare rows of cards and award a point to the player with the highest number in each row. Includes play mat, cards, score cards, instructions, center sign, and a worksheet for an alternate 2-player activity. CC: Math: 1.NBT.B.3, 2.NBT.A.4, 3.NBT.A.1, 4.NBT.A.2

• An activity sheet to help students understand place value to the ten thousands.
• [member-created using abctools]

• A two page mini-office illustrating place value.
• A two page mini-office illustrating place value.

• 255 + 613. Rounding to 100 Common Core: 4.NBT.A.3
• 1,527 + 1,031. Rounding to 1000 Common Core: 4.NBT.A.3
• 9,683 + 5,044. Rounding to 10,000. Common Core: 4.NBT.A.3
• To ten thousands, with three decimal places.

• To thousands, with three decimal places.
• To thousands, with three decimal places. One example.
• To thousands, with three decimal places.
• Students fill in the charts by placing numbers in the correct place. Three pages.

• Determine the value of a six-digit number by following clues. Good for place value and math vocabulary practice.
• This mini-unit features plenty of practice for rounding to whole numbers. Common Core: 4.NBT.A.3
• From "billions" to "value". Review place value vocabulary with this word search. Answer sheet included.
• "There are ten apples on every tree. There could be apples on the ground under each tree. Complete the table to show the total number of apples per tree." This lesson helps students with visualizing and understanding place value. (2 to 47 trees)
• "There are ten apples on every tree. There could be apples on the ground under each tree. Complete the table to show the total number of apples per tree." This lesson helps students with visualizing and understanding place value. (12 to 342 trees)
• "There are ten apples on every tree. There could be apples on the ground under each tree. Complete the table to show the total number of apples per tree." This lesson helps students with visualizing and understanding place value. (from 1 to 75 trees)
• Worksheet practicing rounding numbers to the nearest 10 and estimating the differences. Common Core: 4.NBT.A.3
• Worksheet practicing rounding numbers to the nearest 10 and estimating the sums. Common Core: 4.NBT.A.3
• Worksheet practicing rounding numbers to the nearest 100 and estimating the sums. Common Core: 4.NBT.A.3
• Round to hundreds and to thousands. Common Core: 4.NBT.A.3
• Practice inequalities with a medieval theme.