0.56÷0.04=1.44÷2=24.6÷0.6=4.5÷0.15=
0.63÷0.09=12.84÷1.2=3.9÷0.13=1.6÷1.6=
20÷0.25=1.3÷2.5=100÷12.5=7.8÷0.13=
3.24÷0.8=13×1.1=5.46÷3=4.07×3=
5.28t-1.99t=0.6+89=5.7×0.1=1.6÷0.4=
6÷0.3=5÷0.25=0.45×3=0.35×8=
7.1-0.76=1.2×0.3=0.76÷4=1.9×0.8=
4.2-2.8=7.2÷1.6=19.8+3.2=18-17.45=
4.5+1.5=0.75x+0.25x=2.5×4=0.46÷2=
0.7×1.4=1-0.92=8×0.125=3.4÷20=
10a-1.8a=4.8×0.2=0.3÷0.15=0.15÷2=
0.2×0.5=2.2-1.8=3.1+1.75=32.8+1.9=
0.42×0.5=0.76+1.24=3.06-0.72=0.51÷17=
5.2÷13=8.2×0.01=1.72-0.73=1.6×0.4=
4.8b+3.2b=2.5×4=0.3×101=1.2×0.5=

解:
0.56÷0.04=14,1.44÷2=0.72,24.6÷0.6=41,4.5÷0.15=30,
0.63÷0.09=7,12.84÷1.2=10.7,3.9÷0.13=30,1.6÷1.6=1,
20÷0.25=80,1.3÷2.5=0.52,100÷12.5=8,7.8÷0.13=60,
3.24÷0.8=4.05,13×1.1=14.3,5.46÷3=1.82,4.07×3=12.21,
5.28t-1.99t=3.29t,0.6+89=89.6,5.7×0.1=0.57,1.6÷0.4=4,
6÷0.3=20,5÷0.25=20,0.45×3=1.35,0.35×8=2.8,
7.1-0.76=6.34,1.2×0.3=0.36,0.76÷4=0.19,1.9×0.8=15.2,
4.2-2.8=1.4,7.2÷1.6=4.5,19.8+3.2=23,18-17.45=0.55,
4.5+1.5=6,0.75x+0.25x=x,2.5×4=10,0.46÷2=0.23,
0.7×1.4=0.98,1-0.92=0.08,8×0.125=1,3.4÷20=0.17,
10a-1.8a=8.2a,4.8×0.2=0.96,0.3÷0.15=2,0.15÷2=0.075,
0.2×0.5=0.1,2.2-1.8=0.4,3.1+1.75=4.85,32.8+1.9=34.7,
0.42×0.5=0.21,0.76+1.24=2,3.06-0.72=2.34,0.51÷17=0.03,
5.2÷13=0.4,8.2×0.01=0.082,1.72-0.73=0.99,1.6×0.4=0.64,
4.8b+3.2b=8b,2.5×4=10,0.3×101=30.3,1.2×0.5=0.6.
故答案為:14,0.72,41,30;7,10.7,30,1;80,0.52,8,60;4.05,14.3,1.82,12.21;3.29t,89.6,0.57,4;20,20,1.35,2.8;6.34,0.36,0.19,15.2;1.4,4.5,23,0.55;6,x,10,0.23;0.98,0.08,1,0.17;8.2a,0.96,2,0.075;0.1,0.4,4.85,34.7;0.21,2,2.34,0.03;0.4,0.082,0.99,0.64;8b,10,30.3,0.6.
分析:本題按照運算法則直接求解;注意含有字母的算式,結(jié)果不要忘記字母.
點評:本題考查了小數(shù)的計算,計算時要細心,注意小數(shù)點的位置.
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