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1. 直接写出得数。(20☆)
$3.5×0.4= $
$7.2÷8= $
$15×0.5= $
$0.66÷3.3= $
$5×1.5= $
$0.24÷0.6= $
$5.3×0.4= $
$4.7×30= $
$132÷0.4= $
$8×0.14= $
$0.45÷0.5= $
$2.1×5= $
$7.4×2= $
$0.2×0.75= $
$5.1÷0.3= $
$1.6×0.5= $
$3.6×7= $
$9.4÷0.02= $
$2.7×0.3= $
$9.1÷0.13= $
$3.9÷30= $
$1.07×5= $
$1.8÷0.9= $
$700÷0.7= $
$0.48÷0.08= $
$0.6×0.15= $
$0.22÷1.1= $
$0.72÷4= $
$49÷0.07= $
$0.39÷0.13= $
$4.41÷3= $
$0.99÷9= $
$64÷0.08= $
$6×0.15= $
$27×0.8= $
$0.6÷10= $
$0.93÷3= $
$0.7×0.5= $
$1.5÷0.5= $
$2.15×0= $
$3.5×0.4= $
1.4
$7.2÷8= $
0.9
$15×0.5= $
7.5
$0.66÷3.3= $
0.2
$5×1.5= $
7.5
$0.24÷0.6= $
0.4
$5.3×0.4= $
2.12
$4.7×30= $
141
$132÷0.4= $
330
$8×0.14= $
1.12
$0.45÷0.5= $
0.9
$2.1×5= $
10.5
$7.4×2= $
14.8
$0.2×0.75= $
0.15
$5.1÷0.3= $
17
$1.6×0.5= $
0.8
$3.6×7= $
25.2
$9.4÷0.02= $
470
$2.7×0.3= $
0.81
$9.1÷0.13= $
70
$3.9÷30= $
0.13
$1.07×5= $
5.35
$1.8÷0.9= $
2
$700÷0.7= $
1000
$0.48÷0.08= $
6
$0.6×0.15= $
0.09
$0.22÷1.1= $
0.2
$0.72÷4= $
0.18
$49÷0.07= $
700
$0.39÷0.13= $
3
$4.41÷3= $
1.47
$0.99÷9= $
0.11
$64÷0.08= $
800
$6×0.15= $
0.9
$27×0.8= $
21.6
$0.6÷10= $
0.06
$0.93÷3= $
0.31
$0.7×0.5= $
0.35
$1.5÷0.5= $
3
$2.15×0= $
0
答案
2. 下面的式子是方程的在括号里画“√”,不是方程的画“×”。(12☆)
$x-2$(
$6x= 1$(
$x÷1= 0.5$(
$5x+18＞22$(
$n= 0$(
$4x+2＜8$(
$m+4n= 17.5$(
$30+22= 55$(
$x-2$(
×
)$6x= 1$(
√
)$x÷1= 0.5$(
√
)$5x+18＞22$(
×
)$n= 0$(
√
)$4x+2＜8$(
×
)$m+4n= 17.5$(
√
)$30+22= 55$(
×
)答案
× √ √ ×
√ × √ ×
√ × √ ×
3. 计算下面各题,能简算的要简算。(18☆)
$1.2×(0.138÷0.23)$
$19.8÷(54.5-51.2)$
$88×0.25÷40$
$(8.1-5.4)÷3.6+85.7$
$5.7×3.9+4.3×3.9$
$10.7-22.78÷3.4$
$1.2×(0.138÷0.23)$
$19.8÷(54.5-51.2)$
$88×0.25÷40$
$(8.1-5.4)÷3.6+85.7$
$5.7×3.9+4.3×3.9$
$10.7-22.78÷3.4$
答案
0.72 6 0.55
86.45 39 4
86.45 39 4
