口算:
0.3÷0.1=

3.25×4=

15.5+0.45=

23×0.02=

0+2÷4=
302=0.43=3.05÷100=1-0.99=4.5÷3×3=

解:
0.3÷0.1=3,
3.25×4=13,

15.5+0.45=15.95,

23×0.02=0.46,

0+2÷4=0.5,
302=900,0.43=0.064,3.05÷100=0.0305,1-0.99=0.01,4.5÷3×3=4.5.

分析:根據(jù)小數(shù)的加減乘除與有理數(shù)的乘方的計(jì)算方法進(jìn)行計(jì)算即可.
點(diǎn)評(píng):本題主要考查小數(shù)的口算,看清數(shù)據(jù)和運(yùn)算符號(hào)進(jìn)行計(jì)算即可.
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