This interactive Java applet helps users develop place value concepts involving addition of numbers with 1, 2, 3, or 4 digits. The virtual blocks are manipulated to model regrouping in order to solve addition problems posed by the applet. Users also may create and solve their own problems with whole numbers or up to 3 decimal places. The default of base 10 may be changed to any of the bases 2, 3, 4, or 5.
3. Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
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.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
7. Add and subtract within 1000, 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. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
2. Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
1. Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
1. Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
a. Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.392 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
7. Add, subtract, multiply, and divide decimals to hundredths, 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.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
Look for and make use of structure.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
2. Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
1. Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated