来自吕令保的问题
计算:3.51×49+35.1×5.1+49×51=______.
计算:3.51×49+35.1×5.1+49×51=______.
1回答
2020-05-14 10:06
计算:3.51×49+35.1×5.1+49×51=______.
计算:3.51×49+35.1×5.1+49×51=______.
3.51×49+35.1×5.1+49×51
=3.51×49+3.51×51+49×51
=3.51×(49+51)+49×51
=351+(50-1)×(50+1)
=351+2500-1
=2850.
故答案为:2850.