把3.97精确到十分位是 ,把6.994保留两位小数是 .
0.0485×2500+485×0.24+51×4.85= .
计算:12.34×56.78+876.6×5.678= .
计算:148×32+148×67+147= .
直接写得数:125×64= 198÷99×34+34= .
直接写得数.42×48= 32×125= 400065×65= 45×11= 49518.8﹣3.67﹣3.8﹣6.33= 3.35+4.28+6.65+5.72= .