加减乘除英语讲解-1.ppt

加、减、乘、除 ＋－×÷ The Expressions addition 2+4=？ How much is two plus four? 用and?,plus?,?added?to?等词表示。 2?＋4?＝ 6? 可译为： Two?and?four?is?six?.? Two?plus?four?is?equal?to?six?.? Two?added?to?four?equals?six?.? Two?and?four?makes?six?.? Two?plus?four?will?be?six?.? If?you?add?two?to?four?,?you?get?six?.? 3+4=7 Three plus four is seven. Three and four makes seven. equal So, we can say: Three and four is equal to seven. Three added to four equals seven. What’s three plus four? It’s seven. subtraction 8-3＝? How much is ten minus six? 8-3=5 minus 8-3=5 可译为： ? Eight?minus?three?is?five?.? Eight?minus?three?is?equal?to?five?.? multiplication Time (v.) or multiply 3×4＝? How much is three times four? 3×4＝12 Three times four is twelve. Multiply three by four, we get twelve. Three multiplied by four makes twelve. division 15÷5＝? How much is fifteen divided by five? 15÷5＝3 Fifteen divided by five is three. Fifteen divided by five equals/makes four. Some fractions ? three fourths; three quarters ? a half ? a/one quarter 1? one and a half 3? three and one fourth; three and one quarter Some examples: 一个半小时： one and a half hours 二又四分之三米： two and three-fourths meters 五分之四英寸： four-fifths inch Thank you! * * divide ÷ multiply × subtract minus － add plus and ＋ * * *