By Sarah K. Morgan Major
Formerly released by way of Zephyr Press
This source is helping effortless scholars effectively research position worth strategies with visible and kinesthetic studying options and contains a wealth of worksheets, tests, and overheads for copy.
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Extra resources for Place Value (Kid-Friendly Computation)
Example text
Remind the children, if necessary, that they need to “make a ten” and move it to the tens place mat. Then they can clear the mat, draw another card, and build the next problem. Subtraction, or “Take from Ten” Start with the children’s place-value mats set up with 16 sticks (one 10 and six 1s) on them. ) As always, I use a story to introduce the new concept of taking from ten when there are not enough sticks in the ones office to subtract from there. “Take from Ten” Story You walk in the office door one morning and find that the air conditioning has broken and the office is hotter than hot!
Point out that the action still makes the shape of a backwards numeral 7: (1) Check the ones side, (2) move to the tens and unbundle, and (3) put any leftover sticks in the ones office. Practice these types of problems until the children are fluent with procedures for addition and subtraction. 27 Chapter 4 Subtracting Two-Digit Numbers For a further challenge, set up the place-value mats with a number over 20 and lead students through subtracting a two-digit number, as described in the following example.
The following is an example of the conclusions students would reach for this type of problem: 18 – 5 13 48 Part 1, Beginning: We have 18, or one 10 and eight 1s. Part 2, Action: Five 1s leave. We can take from the ones. Part 3, Ending: Now we have one 10 and we have three 1s. Taking Stock 5. Next present a “make a ten” problem and talk through the same steps of finding and describing the three story parts, as shown in the illustration: 8 + 6 14 Part 1, Beginning: We have eight 1s (and no tens).