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# Number & Operations in Base Ten

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• "I have - Who has?" Practice the numbers 1-999 with this place value game. (Includes hundreds place and numbers up to 999).
• "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. (from 1 to 75 trees)
• Using golden bead Montessori place value to solve problems.
• 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 100 and estimating the sums. Common Core: 4.NBT.A.3
• To thousands, with three decimal places. One example.
• "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)
• 255 + 613. Rounding to 100 Common Core: 4.NBT.A.3
• 9,683 + 5,044. Rounding to 10,000. Common Core: 4.NBT.A.3
• A two page mini-office illustrating place value.

• 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.
• 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..."
• Round to hundreds and to thousands. Common Core: 4.NBT.A.3
• To thousands, with three decimal places.
• Place value chart game with decimals.
• Determine the value of a six-digit number by following clues. Good for place value and math vocabulary practice.
• [member-created using abctools]

• 1,527 + 1,031. Rounding to 1000 Common Core: 4.NBT.A.3
• Worksheet practicing rounding numbers to the nearest 10 and estimating the sums. Common Core: 4.NBT.A.3
• Use this crossword to review place values.
• This mini-unit features plenty of practice for rounding to whole numbers. Common Core: 4.NBT.A.3
• Place value chart game (hundreds).
• Chart and pieces for place value game.
• From "billions" to "value". Review place value vocabulary with this word search. Answer sheet included.
• A two page mini-office illustrating place value.
• An activity sheet to help students understand place value to the ten thousands.
• To ten thousands, with three decimal places.

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

• "I have - Who has?" Practice the numbers 1-999 with this place value game. Includes hundreds place and numbers up to 999.
• 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

• Practice inequalities with a medieval theme.