0.8×0.3+0.7×0.8的值等于


  1. A.
    0.94
  2. B.
    0.08
  3. C.
    0.176
  4. D.
    0.8
D
分析：0.8×0.3+0.7×0.8，運(yùn)用乘法分配律進(jìn)行簡算．
解答：0.8×0.3+0.7×0.8，
=0.8×（0.3+0.7），
=0.8×1，
=0.8．
故選：D．
點(diǎn)評：此題考查的目的理解乘法分配律的意義，并且能夠運(yùn)用乘法分配律進(jìn)行簡便計算．
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1.23÷3=0.8×11=1-0.75=
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1.2÷0.3=0.75×4=15×0.4=
2.14-0.9=4×0.25=10÷2.5=
0.4×52=1.6×0.4=9.6÷6=
4.3-0.4=7-6.2=0.86-0.3=
8.8÷2.2=2.6÷0.2=0.15×3=
0.9÷0.45=0.27÷3=0.51+1.7=
0.6÷0.5=0.125×8=0.38×1000=
6.8-1.7=2.4×0.2=32.8+19=
0.56÷14=1÷0.05=6÷12=
0.14×5=3×1.4=4.9÷0.7=
0.4÷8=6.3+3.7=3.5×0.2=
0.2×12.6×5=8.4÷4.2=2.4×0.5=
0÷3.5×0.2=0×9.7+2.3=1.6×9+1.6=
3.8+1.2=4.8÷0.3=530+270=
7.6÷3.8=92÷2.3=9.6-1.6=
7.2+2.8=2.63+0.37=0.67+1.24=
0.3×101=
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16÷1.6=
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