问题
填空题
在横线内填上合适的数,使等式成立
37×4=120+______=______
86×5=______+30=______
68×3=180+______=______
74×3=______+12=______
317×3=900+______=______
512×4=______+48=______
915÷3=300+______=______
720÷3=200+______=______.
答案
37×4=120+28=148;
86×5=400+30=430;
68×3=180+24=204;
74×3=210+12=222;
317×3=900+51=951;
512×4=2000+48=2048;
915÷3=300+5=305;
720÷3=200+40=240.
故答案为:28,148,400,430,24,204,210,222,51,951,2000,2048,5,305,40,240.