235*12.1+235*42.2-135*54.3=?
问题描述:
235*12.1+235*42.2-135*54.3=?
答
235*12.1+235*42.2-135*54.3=235*(12.1+42.2)-135*54.3=235*54.3-135*54.3=(235-135)*54.3=5430
235*12.1+235*42.2-135*54.3=?
235*12.1+235*42.2-135*54.3=235*(12.1+42.2)-135*54.3=235*54.3-135*54.3=(235-135)*54.3=5430