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用简便方法计算下面各题:1997+1998+1999+20013425-188-212-25567×999+567×2(91×48×75)÷(25×13×16)
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用简便方法计算下面各题: 1997+1998+1999+20013425-188-212-25 567×999+567×2(91×48×75)÷(25×13×16) |
1997+1998+1999+20013425-188-212-25
567×999+567×2(91×48×75)÷(25×13×16)
1997+1998+1999+20013425-188-212-25
567×999+567×2(91×48×75)÷(25×13×16)
1997+1998+1999+20013425-188-212-25
567×999+567×2(91×48×75)÷(25×13×16)
1997+1998+1999+20013425-188-212-25
567×999+567×2(91×48×75)÷(25×13×16)
▼优质解答
答案和解析
(1)1997+1998+1999+2001
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63. (1)1997+1998+1999+2001
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63. (1)1997+1998+1999+2001
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63. (1)1997+1998+1999+2001
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63.
(1)1997+1998+1999+2001 =(2000-3)+(2000-2)+(2000-1)+(2000+1) =2000×4-5 =7995; (2)3425-188-212-25 =3425-(188+212)-25 =3425-400-25 =3000; (3)567×999+567×2 =567×(999+2) =567×(1000+1) =567×1000+567 =567000+567 =567567; (4)(91×48×75)÷(25×13×16) =(63×25×13×16)÷(25×13×16) =63×(25×13×16)÷(25×13×16) =63; 故答案为7995;3000;567567;63. |
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63.
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63.
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63.
=(2000-3)+(2000-2)+(2000-1)+(2000+1)
=2000×4-5
=7995;
(2)3425-188-212-25
=3425-(188+212)-25
=3425-400-25
=3000;
(3)567×999+567×2
=567×(999+2)
=567×(1000+1)
=567×1000+567
=567000+567
=567567;
(4)(91×48×75)÷(25×13×16)
=(63×25×13×16)÷(25×13×16)
=63×(25×13×16)÷(25×13×16)
=63;
故答案为7995;3000;567567;63.
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