12.
24个5是120; | 120的7倍是840; |
5除75商15; | 把640平均分成4份,每份是160. |
8.
口算题,我最棒 50×4= | 210×3= | 560÷8= | 43×2= |
8-2×4= | 96÷3= | 43÷7= | 420×2= |
300÷6= | 69×0×32= | 850÷5= | 1000÷2= |
125×8= | 110×8= | 17×5-80= | 243-200= |
120×4= | 840÷4= | 420+80= | 10-0÷3= |
6.
0 159588 159596 159602 159606 159612 159614 159618 159624 159626 159632 159638 159642 159644 159648 159654 159656 159662 159666 159668 159672 159674 159678 159680 159682 159683 159684 159686 159687 159688 159690 159692 159696 159698 159702 159704 159708 159714 159716 159722 159726 159728 159732 159738 159744 159746 159752 159756 159758 159764 159768 159774 159782 199269
计算 -380-839= | -9438+893= | 834-6422= |
34×43= | 653÷32= | 17X×(-4)= |
138÷13= | (-369X2)÷3= | 9567+7899= |
341+(-56)= | (-97)×35= | 7525÷(-25)= |
8267-(-876)= | 678-(+12)= | 576×(-7)= |