1∼12能算出二年级加减乘除口算题各一题吗

来源：蜘蛛抓取(WebSpider) 时间：2017-03-18 21:31 标签： 小数加减乘除口算题
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双语数学(1)—加减乘除的英文表达
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作者：孙叶萍
双语数学(1)&加减乘除的英文表达
1.&加&用plus，and或add表示；&等于&用is，make，equal等词表示。
adding the following:求和
加 plus(介词.), add(动词), addition(名词) ；被加数 augend, summand ；加数 addend ；和 sum
2+3=? 可表示为： How much is two plus three?
Two plus three is five． Two and three are equal to five．
Two and three make five． Two added to three equals five．
If we add two to/and three, we get five．
commutative property of addition加法交换率:changing the order of the addends does not change the sum..
associative property of addition: If a,b and c are real numbers ,then (a+b)+c=a+(b+c).changing the manner of combining addends doesn&t change the sum.
2. &减&用 minus或 take from表示 minuend被减数,subtrahend减数 difference差
减 minus(介词), subtract(动词), subtraction(名词)
　　10－6＝?　How much is ten minus six?
　　10-6=4 Ten minus six is four．
　　Take six from ten and the remainder is four.
　　Six (taken) from ten is four．十减去六等于四
3. &乘&用time（动词）或multiply表示
乘 times(介词), multiply(动词), multiplication(名词)；被乘数 multiplicand, faciend ；因数factors,乘数 multiplier；积 product
　　3X4＝? How much is three times four?
　　3X4=12 Three times four is twelve．
　　Multiply three by four，we get twelve．
　　Three multiplied by four makes twelve． 三乘以四等于十二
In a multiplication equation, these are the two (or more) numbers which are multiplied together.
Any number multiplied by 1 is itself.
To multiply a number by ten, simply add a zero at the end of the original number.
0和任何数相乘都得0。
Commutative property of multiplication乘法交换率:If a and b are real numbers, then a&b=b&a，changing the order of the factors does not change the product.
Is addition commutative ?
Is subtraction commutative ?
Is multiplication commutative ?
Is division commutative ?
associative property of multiplication结合率:If a,b and c are real numbers ,then a(bc)=(ab)c. changing the grouping of multiplying factors does not change the product.
distributive property of multiplication over addition 乘法对加法的分配率：If a,b and c are real numbers ,then a(b+c)=ab+ac.
For every real number &a&:a+0=a.0 is the identity element for addition.
For every real number &a&:a&1=a. 1 is the identity element for multiplication.
4. &除&用divide的过去分词形式表示
除 divided by(介词.), divide(动词), division(名词)
可被整除的数 divisible；被整除divided evenly；被除数 dividend ；除数 divisor ；余数remainder；商 quotient
16&4=? How much is sixteen divided by four?
　　16&4＝4 Sixteen divided by four is four．
　　Sixteen divided by four equals/gives/makes four．
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