简便运算.1874-298= 762+99= 789-101= 28×25= 125×32= 810÷45= 72×8×5= 480÷6÷8
答案:1 悬赏:60
解决时间 2021-03-28 12:26
- 提问者网友:锁深秋
- 2021-03-28 05:10
简便运算.1874-298= 762+99= 789-101= 28×25= 125×32= 810÷45= 72×8×5= 480÷6÷8
最佳答案
- 二级知识专家网友:末日狂欢
- 2021-03-28 06:12
(1)1874-298,
=1874-300+2,
=1574+2,
=1576;
(2)762+99,
=762+100-1,
=862-1,
=861;
(3)789-101,
=789-100-1,
=689-1,
=688;
(4)28×25,
=7×4×25,
=7×(4×25),
=7×100,
=700;
(5)125×32,
=125×(8×4),
=125×8×4,
=1000×4,
=4000;
(6)810÷45,
=(810÷9)÷(45÷9),
=90÷5,
=18;
(7)72×8×5,
=72×(8×5),
=72×40,
=2880;
(8)480÷6÷8,
=480÷(6×8),
=480÷48,
=10.
=1874-300+2,
=1574+2,
=1576;
(2)762+99,
=762+100-1,
=862-1,
=861;
(3)789-101,
=789-100-1,
=689-1,
=688;
(4)28×25,
=7×4×25,
=7×(4×25),
=7×100,
=700;
(5)125×32,
=125×(8×4),
=125×8×4,
=1000×4,
=4000;
(6)810÷45,
=(810÷9)÷(45÷9),
=90÷5,
=18;
(7)72×8×5,
=72×(8×5),
=72×40,
=2880;
(8)480÷6÷8,
=480÷(6×8),
=480÷48,
=10.
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