表達 幾 (X) 加幾 (Y),可透過 add X and Y (together) 或 add X to Y:If you add 2 and 3, you get 5. ( 2加3得5。) Add five to six to get eleven. ( 5加6得11。) 另外,表達 幾 (X) 加幾 (Y),也可透過 X plus Y ( plus 在此作介系詞用 ):Two plus three is five. ( 2加3等於5。) 4 plus 5 equals 9. ( 4加5等於9。)
還有,表達 幾個數字相加的總和是多少 (Z) 或等於多少 (Z),可透過 be Z、add up to Z、equal Z ( equal 作動詞 )、be equal to Z ( equal 作形容詞 )、make Z 等:2 and 6 is 8. 或 2 and 6 are 8. ( 2加6等於8。) The four angles of a parallelogram always add up to 360 degrees. ( 平行四邊形的四角總和永遠為360度。) 4x plus 2y equals 100. ( 4x加2y等於100。) 2 imperial pints or 40 imperial fluid ounces are equal to 1 imperial quart. ( 2英制品脫或40英制液盎司等於1英制夸脫。) 3 and 5 make(s) 8. ( 3加5等於8。) One hundred pence (= pennies) make(s) a pound. ( 100便士等於1英鎊。) 表達 幾 (X) 減幾 (Y),可透過 subtract Y from X、take Y (away) from X 或 X take away Y:If you subtract 5 from 11, you get 6. ( 11減5得6。) 3 subtracted from 12 equals 9. ( 12減3等於9。) Take 2 (away) from 6 and the remainder is 4. ( 6減2餘4。) Eight take away two is six. ( 8減2等於6。) 另外,表達 幾 (X) 減幾 (Y),也可透過 X minus Y 或 Y from X ( minus 和 from 在此都作介系詞用 ):10 minus 2 leaves 8. ( 10減2剩8。) Eight from twelve is four. ( 12減8等於4。) 表達 幾 (X) 乘幾 (Y),可透過 multiply X by Y 或 multiply X and Y (together):Multiply 4 by 2 to get 8. ( 4乘2得8。) Three multiplied by five equals fifteen. ( 3乘5等於15。) Multiply the length and width (together) to calculate the area. ( 長寬相乘以計算面積。) 另外,表達 幾 (X) 乘幾 (Y),也可透過也可透過 X times Y ( times 在此作介系詞用 ) 或 X Ys:4 times 3 is 12. ( 4乘3等於12。) Two threes are six. ( 2乘3等於6。) 表達 幾 (X) 除以幾 (Y),可透過 divide X by Y:If you divide thirty by ten, you get three. ( 30除以10得3。) 4 divided by 2 is 2. ( 4除以2等於2。) 16 can be divided by 4. ( 16 可以被4整除。) 另外,表達 某個較大的數 (X) 可以被某個較小的數 (Y) 整除幾次 (Z),可透過 Y divides into X Z times、Y goes into X Z times 或 Y(s) into X goes Z (times):20 divides into 80 four times. ( 80可被20 整除4次。) How many times will five go into sixty? ( 60可以被 5 整除幾次?) Four(s) into twelve goes three (times). ( 12可以被 4 整除3次。)