Third, CADCACCDCC
4. 1,1800x5+2500 =11500 (kg) =1/0.5t.
1 1.5 tons < 12 tons
You can pass
2.0.2x2000=4000 (cm) = 40m.
40/3≈ 13 (layer)
3.8X610 = 480 (cubic centimeter) =480ml
The volume of the same object is smaller than the volume, so it is false.
4. 500 x (30/10) x10 =15000ml =15l.
Page 47
1. 1,5x 200/y s-7 9n? d?
2. Equation 4
Equation 2 3 7 9
3. Angle 3 =180-90-x = 90-x.
Angle 3= 180 degrees -2x degrees
Angle 3=( 180 degrees-ideal degree) /2=90 degrees-1/2x degrees.
4 、( 4)+x= 13
x-(6.7)= 2.3
(0. 1)xx=0.9
x/(9/5)=5
5. 1.5b+2.5 5.5
6、x-2 x+2
7、x/y 1/y
8、 23 8
Second, x to x to x to x.
Three solutions equation: x-4/5 = 1/3.
x=5/3
X/2/3x9/ 10=3
x=20/9
10x 0.36—25% = 1. 1
x= 10
4, 1, 2/9x=52
x(2/9+2/5)= 138
(2/5—2/9)x=30
2 、( 80+60)x+ 12=30
3. Solution: Set a ***x page.
X (1-1/3) = 30 or1/3 = x-30.
All by hand, I hope to adopt it.