一、直接写出得数。
1. $8\times40 =$ $10 - 8.5 =$ $0.8\times0.08 =$
2. $6 + 1.7 =$ $1.25 + 1.75 =$ $0.125\times16 =$
10. $2\div4 =$ $72\div0.9 =$ $4.2 + 5.08 =$
1. $9 - 0.85 =$ $1.2\times0.6 =$ $0.72\times0.3 =$
1 - $0.03 =$ $4.9 - 2.4 =$ $7.5 - 3.6 =$
0. $4\times15 =$ $80\div160 =$ $8.4\div0.6 =$
2. $73\div0.3 =$ $0.69 + 3.75 =$ $0.81\times0.9 =$
1. $8\times40 =$ $10 - 8.5 =$ $0.8\times0.08 =$
2. $6 + 1.7 =$ $1.25 + 1.75 =$ $0.125\times16 =$
10. $2\div4 =$ $72\div0.9 =$ $4.2 + 5.08 =$
1. $9 - 0.85 =$ $1.2\times0.6 =$ $0.72\times0.3 =$
1 - $0.03 =$ $4.9 - 2.4 =$ $7.5 - 3.6 =$
0. $4\times15 =$ $80\div160 =$ $8.4\div0.6 =$
2. $73\div0.3 =$ $0.69 + 3.75 =$ $0.81\times0.9 =$
答案:
72 1.5 0.064
@@4.3 3 2
@@2.55 80 9.28
@@1.05 0.72 0.216 0.97 2.5 3.9
@@6 0.5 14
@@9.1 4.44 0.729
@@4.3 3 2
@@2.55 80 9.28
@@1.05 0.72 0.216 0.97 2.5 3.9
@@6 0.5 14
@@9.1 4.44 0.729
二、把下面各数填在相应的方框里。


答案:
真分数: $\frac{1}{2}$ $\frac{1}{3}$ $\frac{4}{9}$ $\frac{3}{4}$ $\frac{5}{7}$ $\frac{5}{6}$ 假分数:$\frac{5}{3}$ $1\frac{1}{2}$ $2\frac{1}{5}$ $\frac{8}{7}$ $5\frac{1}{2}$ $\frac{9}{2}$ $\frac{11}{5}$ $1\frac{3}{4}$
三、列竖式计算。
1. $82\div1.3 =$ $42.36\div0.6 =$ $3.85\div1.6\approx$(得数保留两位小数)

51. $3\div0.27 =$ $1.36\times0.8 =$ $0.72\times0.56 =$
1. $82\div1.3 =$ $42.36\div0.6 =$ $3.85\div1.6\approx$(得数保留两位小数)
51. $3\div0.27 =$ $1.36\times0.8 =$ $0.72\times0.56 =$
答案:
1.4 70.6 2.41 190 1.088 0.4032
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