问题
解答题
用简便方法计算.
|
答案
①125×16,
=125×8×2,
=1000×2,
=2000;
②242+84+(58+116),
=(242+58)+(84+116),
=300+200,
=500;
③35+71+29+65,
=(35+65)+(71+29),
=100+100,
=200.
用简便方法计算.
|
①125×16,
=125×8×2,
=1000×2,
=2000;
②242+84+(58+116),
=(242+58)+(84+116),
=300+200,
=500;
③35+71+29+65,
=(35+65)+(71+29),
=100+100,
=200.