3.51×49+35.1×51+49×51

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3.51×49+35.1×51+49×513.51×49+35.1×51+49×513.51×49+35.1×51+49×514461.093.51*(49+510)+49*51=1962.09+24

3.51×49+35.1×51+49×51
3.51×49+35.1×51+49×51

3.51×49+35.1×51+49×51
4461.09

3.51*(49+510)+49*51
=1962.09+2499
=4461.09

3.51×49+35.1×51+49×51=4461.09
若原式为
35.1×49+35.1×51+49×51=4461.09
=35.1*(49+51)+(50+1)*(50-1)
=35100+2500-1
=37599