4个3相加的乘法算式怎么写

2025-03-16 10:29:06
推荐回答(5个)
回答1:

1.4个3相加的乘法算式:4×3=12

乘法公式

⒈ 公式的应用不仅可从左到右的顺用(多项式乘法),还可以由右向左逆用(因式分解).(因式分解与多项式乘法为逆运算)要记住一些重要的公式变形及其逆运算——除法等。乘法公式

⒉ 基本公式就是最常用,最基础的公式,可以由此而推导出其它公式.

完全平方公式:(a±b)^2=a^2±2ab+b^2,

平方差公式:(a+b)(a-b)=a^2-b^2,

立方和(差)公式:(a+b)(a^2-ab+b^2)=a^3+b^3,(a-b)(a^2+ab+b^2)=a^3-b^3

完全立方公式:(a±b)^3=a^3±3a^2b+3ab^2;±b^3,

三数和平方公式:(a+b+c)^2=a^2+b^2+c^2+2ab+2ac+2bc,

欧拉公式:(a+b+c)(a^2+b^2+c^2-ab-ac-bc)=a^3+b^3+c^3-3abc

回答2:

以往老教材要求是,4个3的乘法算式是3*4.现在新教材是3*4或4*3这两个乘法算式都可以。

回答3:

4×3=12

至于楼主给其它人发的那个题目图片……楼主写错了,2个8相加,写成加法,应该是:
加法:8+8=16 或 2+2+2+2+2+2+2+2(8个2)=16
乘法:2×8=16

回答4:

3+3+3+3就是4*3

回答5:

3×4=12

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