2、(72*2/3+6)/90%=60
3、2X+0.5=6/7。
X=5/28
2.5/6 *12 =10 (DM) 5/6 * 5/6 = 25/6 (square decimeter), 5/6 * 5/6 = 125/265438+.
Iii. 1. 1 m = 1 1 decimeter.
11* 6+1* 9 * 2+6 * 9 * 2 = 372 (square decimeter)
1 1*6*9=594 (cubic decimeter)
Four. 2 1/3=7 (topic) 27/4=6.75 (topic)
Xiaoming runs very fast.
Verb (abbreviation of verb) 4*( 1-4/5)=4/5 (meter) or 4-4*4/5=4/5 (meter).
Six or three centimeters =30 centimeters.
30*30* 1.5= 1350 cubic centimeter = 1.35 cubic decimeter