在一条长120米的隧道一侧，从头到尾共安装了16盏节能灯（两头都安装），平均每隔多少米安装一盏灯？
脱口而出 205+76= 6.75+2= 1000÷999= 0.125×8====（）×8=
直接写出得数+=÷= 12×=×= 21÷﹣84=﹣×= 10﹣=×÷×=+÷2=+×=
直接写得数．×0×17=÷4÷=÷= 57×=﹣+=××= 1÷=（6+）×=﹣=+=
4÷=×6÷= 6×+6×=×= （+）×16= 1÷=×= 24%×5=
口算： （1）÷= 4﹣= 0÷（1+）= （2）﹣= 1.75+=××12= （3）2×=÷= 2×（+）=×÷×=
=
=
=（
）×8=
+
=
÷
= 12×
=
×
=
﹣84=
﹣
×
= 10﹣
=
×
÷
×
+
÷2=
+
×
=
×0×17=
÷4÷
÷
= 57×
=
﹣
+
=
×
×
= 1÷
=（6+
）×
=
﹣
=
+
=
=
×6÷
+6×
=
×
=
+
）×16= 1÷
=
×
= 24%×5=
÷
= 4﹣
= 0÷（1+
）=
= 1.75+
=
×
×12=
=
÷
= 2×（
+
）=
×
÷
粤公网安备 44130202000953号