直接写得数.
| (40+4)×25= | (125×9)×8= | 101×78= | 65×99+65= | 58×54+58×46= |
| 1.3-0.7= | 2.4+0.6= | 7×99+7= | 24-19+24+19= |
| 7.5-2.8= | 4×(36-25)= | 4.3+1.5= | 300-84-16= |
| 2-1.1= | 5.5-3.2= | 120÷6÷2= | 3.7+2.5= |
估算.
| 491÷52≈ | 684÷68≈ | 599÷31≈ |
| 3464÷71≈ | 8683÷87≈ | 634÷29≈ |
| 9.8×1000=________ | 0.6+0.24=________ | 10-9.09=________ | ________-0.35=0.35 |
| 0.5÷10=________ | 0.23+7.7=________ | 39÷10×1000=________ | 100÷25×4=________ |
| 6.7+3=________ | 4÷100=________ | 5.3-0.03=________ | ________×100=608. |