一、口算。 (16分)

0.76+2.4=   3-0.83=   1.6÷0.08=   0.42÷4.2=

2.4×3=    9.3÷0.93=   1.3-0.03=   5.7+3.2=

8.4÷8.4=   7.2÷0.72=     0.78×2.5=   0.54÷18=

14 - 4.7=   2.5×0.4=   0.32=  4.2×2.1÷4.2×2.1=

二、竖式计算。(18分,每题3分)

5.75×1.2=    7.38÷3.6=    6.4×3.45=

2.08×75=    18.9÷0.54=     1.3÷0.03≈

(保留两位小数)

三、能简便就简便。(50分,每题5分)

25.4-2.74-3.26     4.3×3.8+5.7×3.8

6.9+3.1×0.2      0.27×99+0.27

4.2-2.1÷0.7+5.08   2.07+2.3+6.93+7.7

2.5×32×12.5     4.5×102

(5.84-3.9)÷0.4    3.68÷0.25÷4

四、解方程。(16分,每题4分)

X+4.8 = 7.48      X-0.36X = 12.8

3X + 4×4.5 =20.1    3(X+2.1)=10.5