问题
解答题
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答案
(1)780÷(223-145),
=780÷78,
=10;
(2)47×101-47,
=47×(101-1),
=47×100,
=4700;
(3)(180-140)×7-160,
=40×7-160,
=280-160,
=120;
(4)128+164+72+36,
=(128+72)+(164+36),
=200+200,
=400;
(5)2000÷125÷8,
=2000÷(125×8),
=2000÷1000,
=2;
(6)65×142-42×65,
=65×(142-42),
=65×100,
=6500.