1.直接写出得数。（每题1★）
60÷5=
3.08+1.2=
75×4=
3.2×0.5=
2.1÷2=
4.5+0.76=
357÷7=
9.6÷0.06=
80÷8=
1800÷200=
48÷0.06=
5×90=
12×30=
15.5+0.5=
3.8×0.2=
4.6÷0.23=
2.7×2=
3.2×0.06=
6.5÷1.3=
77÷0.07=

1. 60÷5=12
3.08+1.2=4.28
75×4=300
3.2×0.5=1.6
2.1÷2=1.05
4.5+0.76=5.26
357÷7=51
9.6÷0.06=160
80÷8=10
1800÷200=9
48÷0.06=800
5×90=450
12×30=360
15.5+0.5=16
3.8×0.2=0.76
4.6÷0.23=20
2.7×2=5.4
3.2×0.06=0.192
6.5÷1.3=5
77÷0.07=1100

2.计算下面各题,能简算的要简算。(每题3★)
0.125×2.58×0.8
5.87×99+5.87
4.25÷0.25+5.75÷0.25
15.4÷[8×(6.34−4.59)]
7.34×2.1+7.34×6.8+7.34×1.1

2. 0.125×2.58×0.8=0.258
5.87×99+5.87=587
4.25÷0.25+5.75÷0.25=40
15.4÷[8×(6.34−4.59)]=1.1
7.34×2.1+7.34×6.8+7.34×1.1=73.4

3.解方程。（每题3★）
$4x+2.6×5=27$
$0.73×3-3x=0.06$
$0.25×(9-x)=1$

3. $x=3.5$ $x=0.71$ $x=5$