SKU: 873553096

Math Mammoth Multiplication & Division 3

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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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ashlynnk
Louisville, US
★★★★★ 4
Cute, comfortable waterproof boots (a little snug to put on)
Size: 7, Color: Velvet Tan/Gum 2
These are really cute Chelsea-style boots and feel very comfortable once they’re on. The waterproof material is great for wet weather and the sole feels sturdy with good traction. They look stylish enough to wear casually but still feel practical for rainy days. The only downside is they can be a little difficult to put on at first because the opening is somewhat snug, but once they’re on they fit well and feel supportive. Overall they’re a great waterproof boot and I’ve enjoyed wearing them.
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Reviewed in the United States on March 17, 2026
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Abby B
Louisville, US
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
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EE
Draper, US
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026
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Kate
Fort Morgan, US
★★★★★ 5
Super cute, comfortable, practical, love that they are slip on
Size: 10.5, Color: Tobacco/Black
I have worn these 2-3 times already. The first day was a school/work day so I was on my feet 9 hours and the only issue I had was with the side of the boot rubbing against my ankle. I just make sure I wear socks high enough to cover my ankles or jeans that go into the boots now for long wear days. Absolutely love them! They keep my feet dry in this snow( we live in Michigan). I had been looking for a pair like this for awhile now and was getting super frustrated that I couldn't find my size in any that I liked. I saw that they had these available in a 10.5 and I wear 11. I looked at the Sorel website reviews (since the amazon ones weren't super helpful on sizing) and they said that the boots ran big so I took a chance on the 10.5 fitting me. They fit perfect. I have long narrow feet but I could see where they would be tight or uncomfortable on someone with wider feet. I've been trying to find a pair for my mom now since she has boot envy.
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Reviewed in the United States on January 27, 2026
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Nicholle King
Grantham, US
★★★★★ 5
Worth it.
Size: 8.5, Color: Crushed Clay/Gum 2
Love all my Sorels. These were really cute, good color, comfortable, warm, fit well, good quality and sturdy. I would order again.
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Reviewed in the United States on March 26, 2026

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