This base ten set helps students visualize and understand place value, estimation, and operations concepts. More advanced students can explore spatial relationships and volume. This interlocking set is washable and durable for years of hands-on activities. Great for centers or individual exploration. Includes 100 units, 30 rods, 10 flats, 1 cube and 96-page Base Ten Book filled with teaching ideas. Units measure 1 x 1 x 1 cm. Rods measure 1 x 1 x 10 cm. Flats measure 1 x 10 x 10 cm. Cubes measure 10 x 10 x 10 cm. Our suggested uses for Interlocking Base Ten Starter Set: Grade 1 Illustrate place value. Show addition by making a 10 or subtracting from 10. Show addition and subtraction of numbers up to 100. Give the student only tens and 9 ones. Make sets to illustrate multiplication. Grade 2 Illustrate place value and ordering of numbers to one thousand. Illustrate addition and subtraction with and without renaming. Make sets and rectangles to illustrate multiplication and division. Use the 100-flat to illustrate ways to make 100. Let the 100-flat represent the number of cents in $1 and use to illustrate addition and subtraction of money within $10. Grade 3 Illustrate part-whole and comparison by subtraction in word problems. Illustrate division and multiplication word problems. Illustrate quotient and remainder. Illustrate multiplication and division of 3-digit numbers by a 1-digit number. Show how multiplying and dividing tens and hundreds is related to multiplying and dividing ones. For example, use 9 units and show 9 ones divided by 3 gives 3 ones, then used 9 rods and show 9 tens divided by 3 gives 3 tens. Make rods of different lengths to create bar graphs. Illustrate addition and subtraction of compound units - the unit cube is 1 cm and the 100-flat is 1 m folded up and the 1000-cube is a km folded up. Grade 4 Let the 100-flat represent 1 whole. The 10-rod is one tenth and the unit cube is one hundredth. Use to illustrate decimals to hundredths, ordering of decimal numbers, and the four operations on decimals. Grade 5 Let the 100-flat represent 1 whole. The unit cube is 1%. Use to illustrate percentage and the relationship between percentage and fractions and decimals. Put ten 10-rods in a row to illustrate word problems using percentage. All ten rods represent the whole, which is a specific number. Use to show whether multiplication or division is needed in such problems as: If the whole is 500, then what value does each 1% piece have? What about 40%. If 40 units, or 40% represents 80, what does 15% represent?
