李老师和32名四年级同学一起去参观科技展览，成人门票每张18元，儿童半价，购买门票一共需要多少钱？
口算．
46+34= 72﹣28= 800×5= 5000+200=
32×2= 96÷3= 80÷4= 7700﹣700=
64÷2= 27+45= 85﹣78= 1400﹣600=
+
=
﹣
=
+
=
﹣
=
直接写得数．
25%×8=
﹣
=
4.8÷0.8=
12×（+）=
口算．
24×75%= 5.2÷1.3=
=
×
= 3÷= 3.1﹣0.3=
0.92= 4.2+
÷0.5=
=
=
直接写出计算结果．
2.6×0.3= 43÷10%= 0.32﹣0.23=
+
=
4
﹣
=
﹣
= 1.3×7+6.7×7=×5÷
×5=
直接写得数．
8×3.14=0.43= 0.125×8= 1﹣
=
9÷
= 1÷0.25=
﹣
=+
=