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1、5 = 72= 16 =12 = 24= = 4- =10= 4=14 = 9=9= = 12= 9=32= = = 16= 16 = =0= = 12= = 45 = 9= = 100= 18 = =17 = 5 = = 12=0= = 12= 0= = 12= = 45 =9= = 100= 18 = = 17 = 5 = = 12= = 45 = 9= = 100= 18 = =17 = 5 = 32= = = 16= 16 = = 5 = 72= 16 =12 = 24 = = 4=10= 4=14 = 9=9= 45 =9= = 100= 18 = = 17 = 5 = = 12=
2、0= = 12=0= = 12= = 45 = 9= = 100= 18 = =17 = 5 = = 12= = 45 =9= = 12= = 45 = 9= = 100= 18 = =12= 0= = =16= 16 = = 5 = 72= =16 = 12 =24= =4-=9= = 12= 0=9= 32= 10= 4=14 = 9=9= = 12= 0= = 12= = 45 =100= 18 = = 17 = 5 = = 12= 0= 9= = = 12= = 45 =9= = 100= 18 = = 17 = 5 = 32= 16= 16 = = 5 = 72= =16 = 12
3、= = =24 = =4= 10=4= 14 = 9= 9= = 12=0= = 12= = 45 = 9= = 100= 18 = =17 = 5 = 4= 12=16 = 100= 18 = = =写出下面各数的倒数。1/9 12 5/131 2/3 1/45/18 2/5 4/77/5 7/9 3/4 6/5 1/5 3/405/8 8/9 5/11填空1、棱长为1厘米的正方体,体积是( )。2、棱长为1分米的正方体，体积是（ ）。3、棱长为1米的正方体，体积是（ ）。4、1升=（ ）立方分米 1毫升=（ ）立方厘米 立方米=（ ）立方分米 720立方厘米=（ ）立方分米填上合适的单位。
4、一苹果的体积约是120（ ）。一个西瓜的体积约是8（ ）。一 台冰箱的容积约是150（ ）。一 个火柴盒的体积约是12（ ）。一 个墨水瓶的容积约是60（ ）。一个热水瓶的溶剂约是2（ ）。一块橡皮的体积约是10 （ ）。一 本词典的体积约是900（ ）。一个文具盒的体积约是（ ）。一个讲台的体积约是（ ）。计算体积。1、一个长方体，长20厘米，宽12厘米，高厘米。2、一个正方体，棱长是6分米。3、一个长方体底面积是60 立方厘米，高7厘米。4、一个长方体，底面是边长为2平方分米的正方形，高5分米。算一算。121/2= 3/112= 32/9=9/1612= 107/15= 3/416=77/
5、10= 43/13= 215/14=121/4= 1/33= 1/93= 5/22= 4/52= 61/2= 算一算。3/44= 7/96/5= 1/5+1/4=9/43/2= 5/185/18= 8/32=6/139= 5/810= 8/156=161/2= = 428=81/4= 1/52/3= 77/5=1、 直接写得数3/45/6= 3/71= 5/87/15=02/3= 8/159/16= 4/52/3=2、 练一练3、4/51/107/12= 5/94/58/27=8/117/83/8= 3/7141/3=1、 计算题 3/7 49/9 - 4/3 12 5/6 2/9 3 1、计算 5/4 + 1/4 4/7 5/9 + 3/7 5/9 5/2 -（ 3/2 + 4/5 ） 7/8 + （ 1/8 + 1/9 ） 2、简算 1、 直接写得数5/93/10= 1/24/7= 7/92/3= 2/52/5= 5/93/9= 5/72/5= 3/42/5= 5/63/5=
