题目内容

0.9+0.9+0.9+0.9改用乘法算式表示是
0.9×4
0.9×4
．
分析：0.9+0.9+0.9+0.9是求4个0.9相加的和，根据小数乘整数乘法的意义：小数乘整数就是求几个相同加数和的简便运算可知，0.9+0.9+0.9+0.9改用乘法算式表示是0.9×4．
解答：解：根据小数乘整数的乘法意义可知，
0.9+0.9+0.9+0.9改用乘法算式表示是0.9×4．
故答案为：0.9×4．
点评：本题考查了小数乘整数的乘法意义．
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直接写出得数．
0.25×40=		 8×1.25= 3.1×0.3= 0.04×0.2=
0.16+0.5= 0.12×6= 0.08×0.5= 1.7-0.03=
1.8×4= 1.25×3×4= 0.2×0.2= 0.71×0.9≈（得数保留一位小数）
3.2×0.2= 1.4×0.4= 3.3÷3= 1.2÷0.3= 0.56÷8=
2.5×0.4= 1.5×2= 0.7×7= 7.3+0.3= 1.23×3=
0.53-0.3= 1.8×0.5= 0.9×0.01= 0.23×3= 1.6÷0.04=
2-1.2= 7.8÷6= 8.4÷0.21= 8.4÷0.7= 1.23×3=
5.6+3.6= 9-2.35= 0.56÷8= 7.3+2.7= 4.8÷1.2=
5.6÷0.4= 4.5÷0.9= 8.1×2= 90÷3= 7.2÷0.9=
1.23+3= 5.6+1.23= 4.5×2= 5.6÷1.4= 6.6÷1.1=
2.1÷3= 0.6×0.5= 3.23×2= 1.8÷3= 7.2÷6=
12.5÷0.1= 0.32÷0.8= 1.6+3.7= 0.45×0.2= 4.8÷0.08=
0.36÷1.8= 0.4×0.5= 8.4+5.6= 8.4÷2.1= 1.8×0.4=
0.01×8= 7.31×100= 0.09×6= 0.8×0.6= 3+2.3=
1.25×8= 3÷5= 2.3+2.3= 6.23+3.6= 9.3÷3=
4.8÷0.8= 7.5-4.5= 5.7+4.3= 0.75÷15= 1÷0.25=
1.2×60= 6÷0.2= 0.21×4= 0.25×4×9= 2.33×1.2=
0.62÷0.62-1= 5+3.2÷0.8= 7.5÷2.5×0= 3.9×0.01= 0.001+10.099=
3-0.98= 6×0.25= 0.63÷0.9= 8.95÷0.895=
4.5+6.3 6.5+4.8 8.6+7.7 10.05+0.4
34.6-4.9 9-4.2 3.45÷10 65.5÷10
9.43÷10 3.2÷100 2.75×10 6.783×100
0.35×2 0.8×6 5.2+1.7 0.01×8
1.6×0.3 7.31×100 3.8×4 6.3×0.1
0.8×0.9 0.7×1.2 2.5×0.4 4.5-1.5
7.5-0.1 0.125×8 0.23×0.5 9.6+5
8.36+0.75 0.35×6 0.83+0.6 3.16×2
0.65×2 4.7×0.4×0 0.09×6 0.4×0.1
2.3×0.3 8.3-2.4 5×0.02 1.68+3.34
9.6÷6 0.03×1.2 0.4+1.5 7.9×0.01
0.45+0.55 1.2+43 9.2-0.8 0.85×4
10.3+2.9 100×0.6 0.3×7 125×0.8
2.5×4 3.7+4.8 7×0.08 3.6÷0.6
9.3+0.7 0.162×100 4.2÷3 0.25×4×1.2．
1、
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2.4×20= 0.12×3= 0.45×2= 3×1.5=
1.2÷0.3= 1÷2= 4.8×100= 4÷0.2=
0.25×8= 0.89÷8.9= 17.8+2.2= 4.2×5=
0.8÷0.2= 5.79÷0.1= 0.35+0.65= 3.4-1.5=
8.9-0.9= 9.2-9.2= 3.6÷0.4= 0.7×11=
15.15÷15= 0.2×0.3= 1.34×4×2.5= 0.9÷4.5=
6÷1.2=
 
           		 0.72÷0.9=
 
         		 2.6÷13=
 
4.8÷0.4=
 
            		 4.4÷4=
 
           		 0.78÷6=
 
7.2÷0.4=
 
            		 1÷0.25=
 
          		 0×0.18=
 
2-0.73=
 
              		0.91+0.09=
 
         		 19.9-0.199×100=
 
．

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