An engaging web-based quiz perfect for reinforcing simple addition and subtraction skills, with sums are up to 20!The entire resource can be seen in the video preview. Just take a look to see if it will be useful to you!HOW DOES IT WORK?The test contains 25 examples. Students need to choose the correct answer. Once they make their choice, the following slide will indicate if the answer is right or wrong. If the answer is wrong, then the test offers to try again.This interactive experience encour