下面各题,怎样算简便就怎样计算 51×101= 3 7 × 2 3 × 7 12 = 44×1.6-0.16×40= 5.04-2.72-0.28= 1 8 ÷ 3 4 × 6 11 = 165× 4 7 +165× 3 7 =
(1)51×101, =51×(100+1), =51×100+51×1, =5100+51, =5151; (2)
=
(3)44×1.6-0.16×40, =44×1.6-1.6×4, =(44-4)×1.6, =40×1.6, =64; (4)5.04-2.72-0.28, =5.04-(2.72+0.28), =5.04-3, =2.04; (5)
=
=
(6)165×
=165×(
=165×1, =165. |