3.61×100= 4.7÷10= 1.5÷0.3= 6.1+0.9= 8.7-7=
8×0.8= 7.7÷77= 3.3+4.7= 0.28÷0.04= 0.034×0.1=
分析:根據(jù)小數(shù)加、減、乘、除法的計(jì)算法則,直接進(jìn)行口算即可.
解答:解:
3.61×100=361; 4.7÷10=0.47; 1.5÷0.3=5; 6.1+0.9=7; 8.7-7=1.7;
8×0.8=6.4; 7.7÷77=0.1; 3.3+4.7=8; 0.28÷0.04=7; 0.034×0.1=0.0034;
點(diǎn)評(píng):此題考查的目的是牢固掌握小數(shù)加、減、乘、除法的計(jì)算法則,并且能夠正確熟練地進(jìn)行口算,提高口算能力.
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