题目内容
口算 4000÷8= | 10-10÷5= | 7.4+0.26= | 52×39≈ |
60×50= | 8+2×0= | 8.3-3= | 595÷6≈ |
口算 4000÷8=500; | 10-10÷5=8; | 7.4+0.26=7.66; | 52×39≈2000; |
60×50=3000; | 8+2×0=8; | 8.3-3=5.3; | 595÷6≈100. |
4000+2200= | 6000-100= | 1000-424= | 27+3×0= | 42×100= | 720÷8= |
1×36+53= | 25-10÷5= | 362+319≈ | 704-298≈ | 1296-89= | 23+457-33= |