一、直接写出得数。(共32分)
$8 + 1.25 =$
$6 ÷ 0.25 =$
$2.28 ÷ 0.4 =$
$1.8 ÷ 0.1 × 0.01 =$
$0.05 ÷ 0.5 =$
$1.01 × 4 =$
$5.3 × 3 =$
$(0.6 - 0.4) × 4.8 =$
$7.5 - 5.65 =$
$8.5 ÷ 0.01 =$
$8.9 - 1.45 =$
$30 - 4.4 × 5 =$
$2.16 ÷ 2 =$
$6.28 ÷ 2 =$
$4.3 × 0.4 =$
$25.71 - 6.8 - 3.2 =$
$3.4 + 4.3 =$
$8.75 + 12.6 =$
$51 ÷ 0.51 =$
$8.1 ÷ 3 × 0.2 =$
$1.2 × 0.9 =$
$1.25 × 0.8 =$
$2.9 × 0.3 =$
$3.26 + 6.74 × 0 =$
$15 - 0.85 =$
$1.24 + 0.95 =$
$1.96 + 3.84 =$
$16.74 - (2.24 + 6.74) =$
$\frac{6}{7} ÷ \frac{7}{2} =$
$\frac{8}{11} ÷ \frac{32}{33} =$
$\frac{5}{26} × 13 =$
$13 × \frac{1}{3} ÷ 13 × \frac{1}{3} =$
$8 + 1.25 =$
$6 ÷ 0.25 =$
$2.28 ÷ 0.4 =$
$1.8 ÷ 0.1 × 0.01 =$
$0.05 ÷ 0.5 =$
$1.01 × 4 =$
$5.3 × 3 =$
$(0.6 - 0.4) × 4.8 =$
$7.5 - 5.65 =$
$8.5 ÷ 0.01 =$
$8.9 - 1.45 =$
$30 - 4.4 × 5 =$
$2.16 ÷ 2 =$
$6.28 ÷ 2 =$
$4.3 × 0.4 =$
$25.71 - 6.8 - 3.2 =$
$3.4 + 4.3 =$
$8.75 + 12.6 =$
$51 ÷ 0.51 =$
$8.1 ÷ 3 × 0.2 =$
$1.2 × 0.9 =$
$1.25 × 0.8 =$
$2.9 × 0.3 =$
$3.26 + 6.74 × 0 =$
$15 - 0.85 =$
$1.24 + 0.95 =$
$1.96 + 3.84 =$
$16.74 - (2.24 + 6.74) =$
$\frac{6}{7} ÷ \frac{7}{2} =$
$\frac{8}{11} ÷ \frac{32}{33} =$
$\frac{5}{26} × 13 =$
$13 × \frac{1}{3} ÷ 13 × \frac{1}{3} =$
答案
1. 9.25
2. 24
3. 5.7
4. 0.18
5. 0.1
6. 4.04
7. 15.9
8. 0.96
9. 1.85
10. 850
11. 7.45
12. 8
13. 1.08
14. 3.14
15. 1.72
16. 15.71
17. 7.7
18. 21.35
19. 100
20. 0.54
21. 1.08
22. 1
23. 0.87
24. 3.26
25. 14.15
26. 2.19
27. 5.8
28. 7.76
29. $\frac{12}{49}$
30. $\frac{3}{4}$
31. 2.5
32. $\frac{1}{9}$
2. 24
3. 5.7
4. 0.18
5. 0.1
6. 4.04
7. 15.9
8. 0.96
9. 1.85
10. 850
11. 7.45
12. 8
13. 1.08
14. 3.14
15. 1.72
16. 15.71
17. 7.7
18. 21.35
19. 100
20. 0.54
21. 1.08
22. 1
23. 0.87
24. 3.26
25. 14.15
26. 2.19
27. 5.8
28. 7.76
29. $\frac{12}{49}$
30. $\frac{3}{4}$
31. 2.5
32. $\frac{1}{9}$
二、计算下面各题,怎样算简便就怎样算。(共 18 分)
$7.02 - 2.9 + 2.98 + 3.1$
$5.4 ÷ (0.9 × 0.2)$
$( \frac{3}{35} - \frac{2}{36} ) × 35 × 36$
$4.2 + 5.8 × 7.5$
$5.4 × [ (1.7 + 1.81) ÷ 0.27 ]$
$( 24 × \frac{5}{6} - 14 ) ÷ \frac{3}{13}$
$7.02 - 2.9 + 2.98 + 3.1$
$5.4 ÷ (0.9 × 0.2)$
$( \frac{3}{35} - \frac{2}{36} ) × 35 × 36$
$4.2 + 5.8 × 7.5$
$5.4 × [ (1.7 + 1.81) ÷ 0.27 ]$
$( 24 × \frac{5}{6} - 14 ) ÷ \frac{3}{13}$
答案
1. 10.2
2. 30
3. 38
4. 47.7
5. 70.2
6. 26
2. 30
3. 38
4. 47.7
5. 70.2
6. 26
三、填表。(共 12 分)

变化前
放大或缩小
变化后
边长/cm
边长/cm
周长/cm
面积/cm²
正方形
3
2:1
8
1:4
变化前
放大或缩小
变化后
边长/cm
边长/cm
周长/cm
面积/cm²
正方形
3
2:1
6
24
36
8
1:4
2
8
4
答案
1. 边长放大为6cm,周长为24cm,面积为36cm²
2. 边长缩小为2cm,周长为8cm,面积为4cm²
2. 边长缩小为2cm,周长为8cm,面积为4cm²
登录