直接写得数．1.5时：45分=1.5×0.6=15-549=0.9×99+0.9=2÷0.25+1.1=312：213=15-17=2.5×3.5×0.4=471-299=49÷38=
直接写得数．
| 1.5时：45分= | 1.5×0.6= | 15-5= | 0.9×99+0.9= | 2÷0.25+1.1= |
| 3：2= | -= | 2.5×3.5×0.4= | 471-299= | ÷= |
直接写得数．
| 1.5时：45分= | 1.5×0.6= | 15-5= | 0.9×99+0.9= | 2÷0.25+1.1= |
| 3：2= | -= | 2.5×3.5×0.4= | 471-299= | ÷= |
| 1.5时：45分= | 1.5×0.6= | 15-5= | 0.9×99+0.9= | 2÷0.25+1.1= |
| 3：2= | -= | 2.5×3.5×0.4= | 471-299= | ÷= |
| 1.5时：45分= | 1.5×0.6= | 15-5= | 0.9×99+0.9= | 2÷0.25+1.1= |
| 3：2= | -= | 2.5×3.5×0.4= | 471-299= | ÷= |
| 1.5时：45分= | 1.5×0.6= | 15-5= | 0.9×99+0.9= | 2÷0.25+1.1= |
1.5时：45分= | 1.5×0.6= | 15-5= | =| 4 |
| 9 |
| 4 |
4 | | 9 |
9 | 0.9×99+0.9= | 2÷0.25+1.1= | | 3：2= | -= | 2.5×3.5×0.4= | 471-299= | ÷= |
3：2= | 3：2=| 1 |
| 2 |
| 1 |
1 | | 2 |
2 | 2=| 1 |
| 3 |
| 1 |
1 | | 3 |
3 | -= | -=| 1 |
| 5 |
| 1 |
1 | | 5 |
5 | =| 1 |
| 7 |
| 1 |
1 | | 7 |
7 | 2.5×3.5×0.4= | 471-299= | ÷= | ÷=| 4 |
| 9 |
| 4 |
4 | | 9 |
9 | =| 3 |
| 8 |
| 3 |
3 | | 8 |
8 |
答案和解析
| 1.5时：45分= | 1.5×0.6=0.9 | 15-5=9 | 0.9×99+0.9=90 | 2÷0.25+1.1=9.1 |
| 3：2= | -= | 2.5×3.5×0.4=3.5 | 471-299=172 | ÷= |
| 1.5时：45分= | 1.5×0.6=0.9 | 15-5=9 | 0.9×99+0.9=90 | 2÷0.25+1.1=9.1 |
| 3：2= | -= | 2.5×3.5×0.4=3.5 | 471-299=172 | ÷= |
| 1.5时：45分= | 1.5×0.6=0.9 | 15-5=9 | 0.9×99+0.9=90 | 2÷0.25+1.1=9.1 |
1.5时：45分= | 1.5时：45分=
| 32 |
| 27 |
| 32 |
32 | 32
| 27 |
27 | 27
1.5×0.6=0.9 | 1.5×0.6=0.9
15-5=9 | 15-5
=9 | 4 |
| 9 |
| 4 |
4 | 4
| 9 |
9 | 9=9
| 5 |
| 9 |
| 5 |
5 | 5
| 9 |
9 | 9
0.9×99+0.9=90 | 0.9×99+0.9=90
2÷0.25+1.1=9.1 | 2÷0.25+1.1=9.1
| 3：2= | -= | 2.5×3.5×0.4=3.5 | 471-299=172 | ÷= |
3：2= | 3：2= 3
| 1 |
| 2 |
| 1 |
1 | 1
| 2 |
2 | 2：
2= 2
| 1 |
| 3 |
| 1 |
1 | 1
| 3 |
3 | 3=
| 3 |
| 2 |
| 3 |
3 | 3
| 2 |
2 | 2
-= | -=| 1 |
| 5 |
| 1 |
1 | 1
| 5 |
5 | 5-
=| 1 |
| 7 |
| 1 |
1 | 1
| 7 |
7 | 7=
| 2 |
| 35 |
| 2 |
2 | 2
| 35 |
35 | 35
2.5×3.5×0.4=3.5 | 2.5×3.5×0.4=3.5
471-299=172 | 471-299=172
÷= | ÷=| 4 |
| 9 |
| 4 |
4 | 4
| 9 |
9 | 9÷
=| 3 |
| 8 |
| 3 |
3 | 3
| 8 |
8 | 8=
| 32 |
| 27 |
| 32 |
32 | 32
| 27 |
27 | 27
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