The crowning touch of the fifth grade of People's Education Press, the second volume of mathematics classroom reference answer Tianya Q&A
Reference answer 1. 1.5.4 5.3 9600 9.6 6700 2.cm？ dm？ m？ L 3.6 The total area of each surface is 4.8 5. 1.50 dm? 125dm？ 6.20 3 7.60 8. 126 2. √×××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××× =6x6x6=2 16(dm？ ) 2.V=abh=9x6x5=270(cm？ )V=Sh=0.3x0.3x3=0.27(m？ 6. 1.6x 3+6x 3.5 x2+3x 3.5 x2 = 18+42+2 1 = 8 1(DM？ ) 2.( 1)V = Sh = 1.2x 1.2x 0.9 = 1.296(m？ )(2)( 1.2x 0.9 x2+ 1.2x 0.9 x2)x 10 =(2. 16+2. 16)x 10 = 4.32 x 10 = 43.2(m？ )3.4x 3.5x 0.75 = 14x 0.75 = 10.5(kg)4。 (80x80x80) ÷ 20 = 512000 ÷ 20 = 25600 (cm) Seven. 65438 )