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1.加法：加法运算通常用and,plus,add 等表示.如： Seven and [plus] eight is [are,make(s)] fifteen.7加8等于15. If you add ten to eight,you get eighteen.10加8等于18. 2.减法：减法运算通常用 minus,from,take (away) (from) 等表示.如： Eight minus five is [leaves] three.8减 5等于3. 4 from 20 leaves 16.20减4余16. Ten take away four is [leaves] six.10减去4得6.(D8) If you take five from twelve,you’re left with seven.12减去5得7. If you take four away from ten,that leaves six.10减去4得6. 3.乘法：乘法运算通常用 times,multiplied by,twice 等表示.如： Five times three is [equals] fifteen.5乘以3等于15. Five multiplied by two equals ten.5乘以2等于10. What is twice two?2乘2是多少? 4.除法：除法运算通常用 divided by,into 等表示.如： Twelve divided by four is [makes] three.12除以4等于3. Four into twelve is [makes] three.12除以4等于3. |
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