加减乘除英语讲解.ppt

加、减、乘、除加、减、乘、除加、减、乘、除加、减、乘、除＋－＋－×÷The Expressions ＋＋add plus and －－subtract minus ×multiply ÷divide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•¾ three fourths; three quarters •½ a half•¼ a/one quarter•1½ one and a half •3¼ 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!Thank you!。