SKU: 873553096

Math Mammoth Multiplication & Division 3

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Description

Math Mammoth Multiplication & Division 3Math Mammoth Multiplication & Division 3 focuses on multi digit multiplication and long division on the 5th grade level. This means the book is not meant for the initial teaching of those algorithms, but for practicing them with more digits than in 4th grade when students initially learned them. The book also contains lessons that aim to develop the student's algebraic thinking. We start out with a little bit of mental math and a lesson on the order

Math Mammoth Multiplication & Division 3 focuses on multi-digit multiplication and long division on the 5th grade level. This means the book is not meant for the initial teaching of those algorithms, but for practicing them with more digits than in 4th grade when students initially learned them. The book also contains lessons that aim to develop the student's algebraic thinking.

We start out with a little bit of mental math and a lesson on the order of operations. The lesson ÒEquationsÓ focuses on the concept of equation as containing two expressions separated by an equals sign.

The lesson titled ÒReview: Multiplication and DivisionÓ emphasizes the connection between multiplication and division, and how we can use that connection to solve simple equations.

Then, students study partial products in two lessons. This process is very handy for mental math. The lessons tie in partial products with an area model and the distributive property. Students also see how partial products are the basis for the standard multiplication algorithm.

Next, students review the standard multiplication algorithm (multi-digit multiplication) and practice using it with 5 and 6-digit numbers. They also review 2-by-2-digit multiplication and extend that skill to 4-by-2-digit and 3-by-3-digit multiplication problems. All along the lessons also include estimation problems and word problems.

Then it is time to review the long division algorithm from fourth grade, and to extend it to divisions with two-digit divisors. Students also work on division problems that can be done with mental math, such as 600 Ö 30, and learn why long division works, based on repeated subtraction.

The lessons for long multiplication often ask the student to estimate the answer before calculating. The lessons for long division ask for the student to check the answer by multiplying. Both of these methods serve the same purpose: to help them gauge whether the calculation is correct. Too often, students simply calculate something and hurry on by, without paying attention to their own work. We need to foster in them a sense of carefulness with calculations, and the habit of checking oneÕs own work for accuracy. If necessary, assign less problems (especially similar calculations) so that students have time to think about and check their answers.

The book ends in a review lesson. The answer key is appended.

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SKU: 873553096

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ryan johnson
Boise, US
★★★★★ 5
Tough and sturdy
Size: Medium
Have lasted my dog for years now and she is a tough chewer. Worth the money
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Reviewed in the United States on December 12, 2025
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Mitch
Louisville, US
★★★★★ 5
Our German Sheppard loves these
Size: Medium
These cost a bit more than tennis balls, but they are so much nicer and longer lasting. For starters, they stay cleaner than tennis balls because they’re smooth rubber. Dirt won’t build up on them and if anything does stick, like grass or soil, it falls off once the dog slobber dries. They’re also thick, so they don’t fall apart or blow out like a normal tennis ball does in our dog’s jaws after 30 seconds. Our GS chomps on these like crazy and the only damage they’ve suffered is a crack that developed from the edge of the hole, but the crack is growing very slowly and none of these balls have totally failed yet. The balls do whistle when thrown ant high speed and that may help a dog track and locate it, but I’m not sure. Our neighbors hear the whistling too so it’s far from silent. Lastly the orange ball is easy to locate out in our yard, but the dark blue practically disappears.
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Reviewed in the United States on April 6, 2025
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Casey B
Bozeman, US
★★★★★ 5
Great for smaller dogs
Size: Small
These two balls are perfect for the smaller mouthed dog that loves to play fetch. These balls are not only super durable (lots of teeth biting), but float in the baby pool we use for our miniature dachshunds. The value here is much better than you’d find anywhere else. The noise, if bitten hard enough, was “low” at best. Easy to spot/find if overthrown. Will definitely buy again once these are in bad repair; so far, so good-love these for my fur babies!
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Reviewed in the United States on October 8, 2024
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E. Schall
New York, US
★★★★★ 5
My dogs favorite balls
Size: Medium
These are great for my dog who always has to have a ball in her mouth. Not too hard so I don't have to worry about her teeth. They last for ever. They do lose their shape a little over time (like I said, she always has a ball in her mouth) they become a little oval in shape. They still bounce, she still chases it and she still chews on it so I don't think she notices or cares. I've gotten her a bag full of these over time and I have only seen one that she chewed a chunk out.
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Reviewed in the United States on September 28, 2023
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Kimmie is happy
Boise, US
★★★★★ 5
My Dachshunds Love These
Size: Small
These balls are durable, flexible material, highly chewable without being easily destroyed. I stuff them with Milkbone Maro Snacks, which are just the right size to twist into the holes in the ball. My dogs literally get an hour+ chewing and chasing entertainment from these. They chew them, they sometimes 'pop' out of their mouths, go rolling across the floor, dogs chasing them. This satisfies their urge to hunt prey. Dachshunds can easily tear this kind of stuff-it-toy apart. These have lasted for a long time without tearing or shredding. I would NOT recommend them for a dog much larger than a tweenie weenie. They're a bit on the small side and might be swallowed by a larger dog. It would be cool it they also came in a larger size (and probably ball wall thickness also) for the bigger dogs to enjoy. These stuff-it chew balls are better than the kong balls my dogs had before these. Highly recommend them.
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Reviewed in the United States on April 19, 2024

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