4.5+5.5= 0.43×100= 9.8-4.8= 2.5÷100=
0.7+0.23= 100÷1000= 3.4×0.2= 0.9-0.09=
0.8×6= 0,5×0.1= 1÷0.5= 5,6÷1=
32-6= 2.75+1.25= 2.5×4= 1.25×8=
0.81÷3÷3= 600÷25÷4= 0.125×32×8= 1.7×0.25×4=
分析:0.43×100把0.43的小數(shù)點向右移動2位即可;32-6表示3×3-6,所以要先算32,再算減法;0.81÷3÷3,600÷25÷4,根據(jù)瀨尿蝦除以兩個數(shù)等于除以這兩個數(shù)的積來簡算;
0.125×32×8運用乘法交換律簡算;1.7×0.25×4運用乘法結合律簡算;其它題目按照運算法則直接求解.
解答:解:4.5+5.5=10,0.43×100=43,9.8-4.8=5,2.5÷100=0.025,
0.7+0.23=0.93,100÷1000=0.1,3.4×0.2=0.68,0.9-0.09=0.81,
0.8×6=4.8,0.5×0.1=0.05,1÷0.5=2,5.6÷1=5.6,
32-6=3,2.75+1.25=4,2.5×4=10,1.25×8=10,
0.81÷3÷3=0.09,600÷25÷4=6,0.125×32×8=32,1.7×0.25×4=1.7.
故此題答案為:10,43,5,0.025,0.93,0.1,0.68,0.81,4.8,0.05,2,5.6,3,4,10,10,0.09,6,32,1.7.
點評:本題是基本的計算題目,計算時要細心,注意小數(shù)點的位置.
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