6.4÷4=7.5÷5=12.3+0.8=
16×0.5=14-7=23.6-0.6=
0.4×0.6=7.2÷8=4.5÷9=
8.7+5.6=0.25×4=0.32+8=

解:

6.4÷4=1.67.5÷5=1.512.3+0.8=13.1
16×0.5=814-7=723.6-0.6=23
0.4×0.6=0.247.2÷8=0.94.5÷9=0.5
8.7+5.6=14.30.25×4=10.32+8=8.32

分析:根據(jù)小數(shù)加減乘除法的計算方法進(jìn)行解答即可.
點(diǎn)評:此題考查了小數(shù)加減乘除法的口算能力,讓解答即可.
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