【单选题】下面算式正确的是( ) A 56× ( 19 + 28 )= 56×19 + 28 B 43 × 12=43 × 10+2 C 64×64 + 36×64 = (64 + 36) ×64 D 37 × 13-13=0
【简答题】脱式计算,能简便计算的要简算. (1)13÷0.4÷2.5 (2)×4.5+36×4.5 (3)1.25×2.5×0.8 (4)1.5×101-1.5 (5)14.+3.7×2.8 (6)2.8×7.3+0.27×28.
【单选题】Out-of-home advertising has become more effective because______.
A.
billboards can be replaced within two hours
B.
consumers travel more now than ever before
C.
such ads have been made much more attractive
D.
the pace of urban life is much faster nowadays
【单选题】包含着新民主主义革命和社会主义革命双重性质的是
【简答题】25×27×4 45×36+×45 1.25×320×25 0.96×25 9.9×999+9.9 1.08×125 8×25×1.25×16 489×101-489 33×1.03 28×45+30×13 5.6×9+56 0.98×54.