Math Mammoth Place Value 1
SKU: 46889491756

Math Mammoth Place Value 1

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Math Mammoth Place Value 1Math Mammoth Place Value 1 focuses on place value and two digit numbers and is primarily meant for first grade level math. When children count, they basically just learn numbers as some kind of continuum that goes on without end. With simple counting, your child might not catch on to the inherent structure of the number system. Our number system is based on the idea that if you have lots and lots of objects, the efficient way to count and denote them

Math Mammoth Place Value 1 focuses on place value and two-digit numbers and is primarily meant for first grade level math.

When children count, they basically just learn numbers as some kind of continuum that goes on without end. With simple counting, your child might not catch on to the inherent structure of the number system. Our number system is based on the idea that if you have lots and lots of objects, the efficient way to count and denote them is with groups of tens, hundreds, and thousands Ñ not individually.

The crucial point in understanding the concept of place value is therefore that a certain position represents a certain size group. The digit in each position tells us how many groups of that size there are. For example, in the number 2,381, an adult already knows that the 8 represents eight tens, and not just "8" and that the 3 represents three hundreds, and not just "3". The place of the digit tells us the size of the group, and the digit itself tells how many of that group.

The initial lessons of the book that introduce tens and ones use a 100-bead abacus extensively. This 100-bead abacus or school abacus simply contains ten beads on ten rods, for a total of 100 beads. It is not the special abacus used by the Chinese or the Japanese. Each bead simply represents one. The 100-bead abacus lets children both "see" the numbers and use their touch while making them.

You will need to purchase this school abacus separately, such as on Amazon, or make your own.

The abacus is used in the first lessons, but it is not the only model used in the book. We also use base-ten blocks as a visual representation of two-digit numbers. If you own a set of base-ten blocks (manipulatives), you can use them along with the visual exercises, if desired.

Moreover, we also use number lines and the 100-chart. Number lines help to visualize how numbers continue indefinitely and also relate to the concept of measuring. The 100-chart helps the child to be familiar with the numbers below 100 and find patterns in the number system.

While most of the lessons in the book focus on place value, students also practice adding and subtracting multiples of ten, and rounding numbers to the nearest ten. The two lessons near the end of the book about tally marks and graphs are real-life applications of two-digit numbers. The last lesson about regrouping can be challenging, thus is optional.

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SKU: 46889491756

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i'm_your_huckleberry
Waukegan, US
★★★★★ 5
For the price, it’s nice
Color: Black, Size: Medium
For the price, this is a really nice jacket. But, for double the price, I bought one at the department store, and it’s way nicer. Would I buy this again? Probably not. Bought a medium, fits like a 38R. I’m 5’9” 175 lbs. slightly snug, but I’m losing weight.
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Reviewed in the United States on April 24, 2026
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StylishFamilyLife
Lowell, US
★★★★★ 5
Great suit jacket
Color: Navy Blue, Size: Large, Color: Navy Blue, Size: Large
We bought this for my son’s school dance and his confirmation. They matched his suit pants that we purchased from a department store and the jacket fit perfectly, running true to size.
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Reviewed in the United States on June 2, 2026
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Amazon Customer
New York, US
★★★★★ 3
Decent
Color: Black, Size: X-Large
Smells strange, assuming its the dye. Good fit, although the arms are quite long. Also had some strange stitch going across the left breast area that seemed like a mistake and was an eye sore. Good value overall for a quick put together suit.
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Reviewed in the United States on November 9, 2025
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Veronica
Port Orchard, US
★★★★★ 5
perfect fit, excellent quality
Color: Navy Blue, Size: XX-Large
Fit perfect true to size great quality loved it on my husband
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Reviewed in the United States on May 29, 2026
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stanley h.
Fort Morgan, US
★★★★★ 5
Nice Suit For The Price
This suit was a time-saver! My wife ordered a tux that wasn't going to make it for a formal occasion, so this was ordered and came within three days. It was a good thing she purchased 2, in case of sizing errors. The extra large pants worked, but sizing down to the large jacket & vest made the best combination/fit. We didn't go with the blue/black bow tie & flower it came with, but may for another event. However, being able to work interchangeably at a low price was rewarding!! Thought to add comments that the look of this suit is pleasing (though it's not the best thread). The workmanship gives it a 5 and even greater. The compliments were many. I do suggest using a good steam iron that will eliminate the wrinkles, without creating unwanted creases, while barely touching the suit; but, definitely follow the creases in the pants leg.
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Reviewed in the United States on March 20, 2025

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