共同核心州立标准（美国）
Grade 4
Grade 4共有 7 项标准，每项都有对应的免费练习单。 9–10 岁
说明是我们用自己的话写的简短概述，并非官方原文。
Operations & Algebraic Thinking
4.OA.B.4
Find factor pairs for whole numbers up to 100, recognise multiples, and decide whether a number is prime or composite.
4.OA.C.5
Make a number or shape pattern that follows a given rule and notice features of the pattern.
现成的练习单
Number & Operations: Fractions
4.NF.B.4
Multiply a fraction by a whole number, for example to find a fraction of an amount.
现成的练习单
Measurement & Data
4.MD.A.2
Solve word problems about distances, time, volume, mass and money, including simple fractions and decimals.
现成的练习单
4.MD.A.3
Use the area and perimeter formulas for rectangles in real-world and maths problems.
现成的练习单
4.MD.C.7
Treat angle measure as additive and find unknown angles in diagrams using addition and subtraction.
Language
L.4.2.D
Spell grade-appropriate words correctly, checking references as needed.