共同核心州立标准（美国）
Grade 3
Grade 3共有 11 项标准，每项都有对应的免费练习单。 8–9 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
3.OA.A.2
Understand whole-number division as sharing equally or making equal groups.
3.OA.A.4
Find the unknown number in a multiplication or division equation, such as 8 × ? = 48.
现成的练习单
3.OA.B.6
Understand division as finding an unknown factor (32 ÷ 8 means the number that times 8 makes 32).
现成的练习单
3.OA.C.7
Multiply and divide fluently within 100 and know all products of two one-digit numbers from memory by the end of Grade 3.
3.OA.D.9
Spot arithmetic patterns, including patterns in the addition and multiplication tables, and explain them.
现成的练习单
Number & Operations in Base Ten
3.NBT.A.2
Add and subtract fluently within 1000 using place value and properties of operations.
现成的练习单
Number & Operations: Fractions
3.NF.A.1
Understand a unit fraction 1/b as one of b equal parts of a whole, and a/b as a of those parts.
现成的练习单
Measurement & Data
Geometry
3.G.A.2
Split shapes into parts with equal areas and name each part as a unit fraction of the whole.
现成的练习单
Language
L.3.2.F
Use spelling patterns and generalisations (word families, syllable patterns, ending rules, word parts) when writing words.