Question

直接寫(xiě)出結(jié)果． 5×40=________	1.25×80=________	9÷45=________	10-0.1=________
88÷0.88=________	9.8+1.12=________	6.1-0.01=________	0.9×0.01=________
8×0.45=________	0.5+1÷0.5=________	0.2×3÷0.2×3=________	0.3×0.14=________．

Answer 1

200    100    0.2    9.9    100    10.92    6.09    0.009    3.6    2.5    9    0.042
分析：本題據(jù)小數(shù)加減法、乘除法的運(yùn)算法則進(jìn)行計(jì)算即可．
解答：

5×40=200	1.25×80=100	9÷45=0.2	10-0.1=9.9
88÷0.88=100	9.8+1.12=10.92	6.1-0.01=6.09	0.9×0.01=0.009
8×0.45=3.6	0.5+1÷0.5=2.5	0.2×3÷0.2×3=9	0.3×0.14=0.042．

點(diǎn)評(píng)：計(jì)算小數(shù)加減法時(shí)要注意小數(shù)點(diǎn)要對(duì)齊，完成小數(shù)乘除法時(shí)，要注意小數(shù)點(diǎn)的移動(dòng)．