【實用教育app】Add Sub K-1|最夯免費app-綠色工廠好玩App

Practice Addition facts through 10 and Subtraction facts up to 20 minus 10. Select Sums to 5 and Sums to 10. Or, select options with Sums to 20 which include addends above 10. You also have the option to adjust the addends separately for your problems in the a+b=c form. And make separate selections for the minuend and subtrahend when solving a-b=c problems.You may also select to use three addends in the form of a+b+c=x+y or a+b+c=x. A subtraction option for a-b=x-y is also provided. Options include showing objects when a problem is displayed, using counters to drag into place, using a 10-frame, or using marker board to help solve the problem.