パッケージ:
sub3.test
ダウンロード:
5K
サイズ:
42 KB
Android 要件:
1.6 以上
アップデート:
2012年6月18日
Most 2nd and 3rd graders struggle with subtraction problems that require borrowing. Having to strike-through numbers and then stack new numbers above them is a confusing process that leads to frustration and under achievement. Here is the answer: let the student step through a prompted sequence and be checked as he/she goes.
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