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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)

题目详情
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)
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)
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)
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)
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)


▼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.