17.下面算式中,计算结果最大的是( )
A. | 38+5×12-8 | B. | 38+5×(12-8) | C. | (38+5)×12-8 | D. | 38+(5×12-8) |
16.口算题:
45-2×7= | 12+12÷12= | 0÷16×9= | 13×6-70= | 280+70= |
100÷4×6= | 450÷5÷9= | 60÷12= | 8×50= | 1000÷20= |
13.用递等式计算.
0 159761 159769 159775 159779 159785 159787 159791 159797 159799 159805 159811 159815 159817 159821 159827 159829 159835 159839 159841 159845 159847 159851 159853 159855 159856 159857 159859 159860 159861 159863 159865 159869 159871 159875 159877 159881 159887 159889 159895 159899 159901 159905 159911 159917 159919 159925 159929 159931 159937 159941 159947 159955 199269
(147-49)×12 | 2800-25×18 | 62+13×26 |
318÷6+165 | 2300-54×19 | 15×(61-45) |