SKU: 97400322490

Singapore Math: Primary Math Textbook 4A US Edition

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Description

Singapore Math: Primary Math Textbook 4A US EditionPrimary Math Textbook 4A (US Ed.) teaches whole numbers, numbers to 100,000; rounding off numbers, factors, multiples, multiplication and division with 2 digit numbers and by 10; adding, subtraction, mixed and improper fractions; graphs, angles, perpendicular and parallel lines, area and perimeter and more. The Primary Mathematics U. S. Edition series of elementary math textbooks and workbooks is meant to be part of a system of learning in which adult

Primary Math Textbook 4A (US Ed.) teaches whole numbers, numbers to 100,000; rounding off numbers, factors, multiples, multiplication and division with 2-digit numbers and by 10; adding, subtraction, mixed and improper fractions; graphs, angles, perpendicular and parallel lines, area and perimeter and more.

The Primary Mathematics U.S. Edition series of elementary math textbooks and workbooks is meant to be part of a system of learning in which adult supervision and independent practice go hand in hand. The main feature of this series is the use of the Concrete to Pictorial to Abstract approach. Students are provided with the necessary learning experiences beginning with the concrete and pictorial stages, followed by the abstract stage to enable them to learn mathematics meaningfully. This approach encourages active thinking process, communication of mathematical ideas and problem solving, which helps develop the foundation students will need for more advanced mathematics. 

Practice exercises are designed to provide the students with further practice after they have done the relevant workbook exercises. Review exercises are provided for cumulative reviews of concepts and skills. All the practice exercises and review exercises are optional exercises.

The color patch  is used to invite active participation from the students and to facilitate oral discussion. The students are advised not to write on the color patches.

Above extract from Preface of Primary Mathematics U.S. Edition (reproduced with the permission of the publishers).

The textbooks contain the learning tasks for students to do under adult supervision and interaction, along with practice and review problems. They are meant to be non-consumable and to be used along with the Primary Mathematics Workbooks.

Answers or answer keys for Primary Mathematics U.S. Edition textbooks and workbooks are found in the teacher's guides and home instructor's guides. Answer keys booklets are also available - one for Primary 1-3 and one for Primary 4-6.

Our recommendation:
Primary Mathematics U.S. Edition 1A-6B is ideal for both classroom and home use for 1st - 7th grades. 

Recommended for those who want a solid, basic math program with a proven track record and an emphasis on concept development, mental techniques, and problem solving. This is primarily a direct instruction program. Students are given several approaches for solving problems and are encouraged to discuss ideas and explore additional methods. 

Product Information
Format: Paperback
Vendor: Singaporemath.com Inc
Dimensions: 10.25 X 7.5 (inches)
ISBN-13: 9789810185060
Series: Singapore Math

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SKU: 97400322490

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nphoton
Massapequa, US
★★★★★ 3
I Wanted to Like It
Style: SPF 50, Size: 1 count (Pack of 1)
I really wanted to like it because of the great reviews it gets with backpackers and generally with people that don't like "greasy hands syndrome" after applying sunscreen. But after using a stick I found that it's just not that good. The good: small, lightweight container. Not greasy. Good protection, I was in the sun all day hiking multiple days straight and only put on sunscreen twice per day and I didn't have any burning... and I burn easily. The bad: Value: the $12.53 sunscreen container only lasted about 8 days. And that was just my arms, neck, and half my face since I wore a shirt and long pants and a wide brim hat every day when hiking. I would expect this amount of sunscreen to last a lot longer than that on such a limited area. I'm not a big person either. Application, chafing: it's the opposite of greasy, almost chalky. You use the stick to apply to your skin in stripes, then you have to "blend it in" by rubbing with the backs of your hands so your palms don't get chalky. Since the stick is so dry this requires a fair amount of force and it chafes as you rub it around. When your skin a bit sandy it hurts. Application, crumbling: on a chilly but sunny morning, about 45 F, I applied sunscreen and small chunks of the stick crumbled off. I watched precious chunks of the already overpriced sunscreen drop to the ground. Residue: while it's not greasy, it's physical sunblock so it gives your skin the characteristic whitish sparkle. That's to be expected. But what I didn't foresee is it will rub off on anything your skin touches. My gear had white chalk-like marks (technically titania powder?) on my shirt collars, backpack straps, sunglasses, and a few other high-touch items. Overall I think it's a neat idea. I'm not overly disappointed with my purchase. But for $12.50 I expect sunscreen to be easier to apply and for the container to last longer than about 8 days. I can't burn $50/month in the summer months when a single container of chemical sunscreen will do the job. Pro tip: you can buy food-safe 3 oz TSA travel containers. Load one of those up with chemical sunscreen and you have something that beats this in every way except for the greasiness, which you can mitigate by picking a lower SPF sunscreen (the 30 SPF you wear is infinitely better than the 50 SPF you skip!).
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Reviewed in the United States on May 2, 2025
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D. Collins
West Palm Beach, US
★★★★★ 5
sunscreen does its job
Style: SPF 50, Size: 3 Fl Oz (Pack of 1)
Works well. Took a little more effort to rub into skin.
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Reviewed in the United States on May 4, 2026
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shannon
West Palm Beach, US
★★★★★ 5
Light and simple
Style: SPF 50 (Pack of 2), Size: 5.5 Ounce (Pack of 2)
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Reviewed in the United States on May 30, 2026
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Cheryl Kozlowski
Dallas, US
★★★★★ 5
Good product
Style: SPF 50 (Pack of 2), Size: 5.5 Ounce (Pack of 2)
Good produce. Great price.
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Reviewed in the United States on March 26, 2026
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Conrad M. Aumann II
San Leandro, US
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Easy and effective
Style: SPF 50 (Pack of 2), Size: 5.5 Ounce (Pack of 2)
Good price for good protection
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Reviewed in the United States on December 5, 2025

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