Just as of today, I got online and available the new Math Mammoth Grade 7-A and 7-B worksheets collections.
These pre-algebra sheets contain problems for beginning algebra topics such as expressions, linear equations, and slope - plus your typical 7th grade math topics such as integers, fractions, decimals, geometry, statistics, and probability.
You will find the problems are very varying as these worksheets have been created one by one (not script made).
Go download and enjoy the free sample sheets! - including a Percent Fact Sheet.
Rabu, 31 Januari 2007
Senin, 29 Januari 2007
Fraction problem with mental math
Someone asked me,
Here are two ways to solve this:
1) These numbers look awkward, but if I changed them to easier ones, for example
"How many times does 2 fit into 834", then we'd all soon realize that we need to use DIVISION.
So the original problem is solved by fraction division:
15 6/8 ÷ 3/4
Are you ready? Remember how to divide fractions?
2) But wait a minute! These numbers aren't so difficult after all... because 6/8 equals 3/4. Let's use this thinking cap of ours - mental math.
3/4 goes into 1 1/2 two times. Doubling that, we find 3/4 goes into 3 four times. And so to 15... fives times that: 3/4 goes into 15 4 × 5 or 20 times!
And, of course 3/4 goes into 6/8 exactly one time.
So all total 3/4 goes into 15 6/8 exactly 21 times. No leftovers. And that was easy!
On another note, Denise in Illinois has made up a mnemonic poem for kids to remember better the "invert and multiply" rule.
How many times does 3/4 fit into 15 6/8?
Here are two ways to solve this:
1) These numbers look awkward, but if I changed them to easier ones, for example
"How many times does 2 fit into 834", then we'd all soon realize that we need to use DIVISION.
So the original problem is solved by fraction division:
Are you ready? Remember how to divide fractions?
2) But wait a minute! These numbers aren't so difficult after all... because 6/8 equals 3/4. Let's use this thinking cap of ours - mental math.
3/4 goes into 1 1/2 two times. Doubling that, we find 3/4 goes into 3 four times. And so to 15... fives times that: 3/4 goes into 15 4 × 5 or 20 times!
And, of course 3/4 goes into 6/8 exactly one time.
So all total 3/4 goes into 15 6/8 exactly 21 times. No leftovers. And that was easy!
On another note, Denise in Illinois has made up a mnemonic poem for kids to remember better the "invert and multiply" rule.
Jumat, 26 Januari 2007
Math Mammoth Measuring worksheets ready
It seems lately that I'm bogged down by all the work with my books. One of the newest developments was I finally got online and ready two worksheets collection in the new "green" series:
Math Mammoth Measuring Worksheets
Math Mammoth Decimals Worksheets
The books in the green series are worksheets by topic, instead of by grade. The worksheets have been pulled out from the grade 3, 4, 5, and 6 collections (so contain duplicate material with those).
These per topic collections, I feel, will be very helpful for teachers who need worksheets on some particular topic, but with varying difficulty levels.
Check out the freebie sample sheets on the two pages above!
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