1樓:匿名使用者
99×32=(100-1)×32=100×32-1×32=3200+32=3232
計算下面各題,怎樣簡便就怎樣計算.49×102-2×49 125×76×8 8.33-2.43-4.57 103×32 6.7+2.63+4
2樓:怕暗
49×102-2×49
=49×(102-2)
=49×100
=4900;
125×76×8
=125×8×76
=1000×76
=76000;
8.33-2.43-4.57
=8.33-(2.43+4.57)
=8.33-7
=1.33;
103×32
=100×32+3×32
=3200+96
=3296;
41000÷8÷125
=41000÷(8×125)
=41000÷1000
=41;
5824÷8×(85-78)
=728×7
=5096;
840÷28+70×18
=30+1260
=1290.
用簡便方法計算 8.33-2.43-4.57
3樓:哥被震精了
8.33-2.43-4.57
=8.33-(2.43+4.57)
=8.33-7
=1.33
此種解法運用的是減法的性質
4樓:呋鼯柉
(1)8.33-2.43-4.57,
=8.33-(2.43+4.57),
=8.33-7,
=1.33;
(2)49×102-2×49,
=49×(102-2),
=49×100,
=4900;
(3)101×92,
=(100+1)×92,
=100×92+1×92,
=9200+92,
=9292;
(4)4800÷25÷4,
=4800÷(25×4),
=4800÷100,
=48.
5樓:來自大覺山明智的馬謖
等於1.33。
因為這道題用的是減法的性質。
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