问题
解答题
下面各题,怎样算简便就怎样计算
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答案
(1)51×101,
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;
(2)
×3 7
×2 3
,7 12
=
;1 6
(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)
÷1 8
×3 4
,6 11
=
×1 8
×4 3
,6 11
=
;1 11
(6)165×
+165×4 7
,3 7
=165×(
+4 7
),3 7
=165×1,
=165.