题目内容

4.8×3.9+0.39+0.39的简便算式是
[     ]
A．（4.8+1+1）×3.9   
B．4.8×3.9+0.39×2  
C．4.8×3.9+0.1×3.9+0.1×3.9=（4.8+0.1+0.1）×3.9
C
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直接写出得数．
6.3+3.7=		 9-1.8= 1.4×0.5=
0.49÷0.7= 1.53+0.8= 3.9-0.39=
0.25×12= 0.51÷0.3= 9.2×0.01=
70÷0.5= 0.16×0.6= 0.69÷2.3=
直接写得数
9-1.8=		 4÷0.5= 1.4×0.5= 5.7÷0.3= 0.5×2.4=
1.53+0.8= 3.9-0.39= 0.25×12= 0.51÷0.3= 5.5÷10=
直接写出得数．
6.3+3.7=		 9-1.8= 1.4×0.5= 0.49÷0.7=
1.53+0.8= 3.9-0.39= 0.25×1.2= 0.51÷0.3=
9.2×0.01= 70×0.5=
直接写出得数．
44÷4.4=
9-1.8=
1.4×0.5=
0.49÷0.7=
70÷0.5=
53+0.8= 3.9-0.39= 0.25×12= 0.51÷0.3= 9.2×0.01=

直接写出得数．
6.3+3.7=		9-1.8=1.4×0.5=0.49÷0.7=
1.53+0.8=3.9-0.39=0.25×1.2=0.51÷0.3=
9.2×0.01=70×0.5=

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