英语中算式的表达方法
(1) +加法：数字 and/plus 数字 is/are/equal(s)/make(s) 得数，谓语动词可单复
5+12=17,
Five and twelve is /are/equal(s)/make(s) seventeen.
(2) -- 减法：被减数 minus is/equals/leaves 得数，谓语动词用单数
8-5=3
Eight minus five is/equals/leaves three.
(3) X乘法：被乘数 times 乘数 is/are/equal(s)/make(s) 得数，谓语动词可单复
3 X 5=15
Three times five is/are/equal(s)/make(s) fifteen.
特殊记忆：1 X 1=1 Once one is one.
2 X 1=2 Twice one is two.
(4) ÷除法： 被除数 divided by 除数 is/equals/makes/goes/gives 得数，谓语动词用单数
如果有余数，在得数后面加 and+余数+over
20÷5=4
Twenty divided by five is/equals/makes/goes/gives four.
20÷3=6---2
Twenty divided by three is/equals/makes/goes/gives six and two over.