(12+20)=0.4+0.36=4.3-1.2=6700cm^2=()m^2 100÷(5*5)= 4.3-4.3=2-0.7=6km60m=()km358*7+7*242= 1.9÷100= 3.4-1.6=3.28kg=()kg()g320÷(16÷4*8)= 7.11+8=3.63+5.7=4.62m^2=()dm^2 13*[129÷(17+26)] =6.07+1.9=0.3+0.47=3356000=()万5...