2.6 25

Two or three kinds (12+ 16) times 2=56 cm.

(80+60) times 30 divided by 2=2 100 m2 3 150 divided by 2 100= 1.5 kg.

4.8 times 8 divided by 2=32 square decimeter r:8 divided by 2=4 decimeter S:3. 14 times 4 times 4=50.24 square decimeter.

50.24-32= 18.24 square decimeter

V. 24 divided by 0.6=40 1.2 divided by 0.6=2 40 times 2 times 2= 160.

I.c:1.5+1.5+1.5 = 4.5cm s:1.5 times 3 divided by 2 = 0.975cm 2.

C: 2.5+2.5+2+1= 8cms: (1+2.5) times 2 divided by 2 = 3.5cm

C: 3. 14 times 3 divided by 2 = 4.71cm4.71+3 = 7.71cm s: 3.14 times the square of 1.5 divided by 2 = 3.55.

Second, parallelogram: length 3 height 2 triangle: bottom 6 height 2

3. 10 times 5=50 cm2 8-5=3 cm (10+ 12) times 3 divided by 2=33 cm2 50+33=83 cm2.

Four, the same length