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<h3 id="1-tiacutenh">1. Tính:</h3> <p>16 + 1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 13 + 3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 10 + 6&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 12 - 2</p> <p>19 -&nbsp; 1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 18 -&nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 10 + 5&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 17 - 7</p> <h3 id="2-so">2. Số?</h3> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/1301-1664797135.png.webp" width="427" height="283" alt="hinh-anh-luyen-tap-1-1212-0" title="hinh-anh-luyen-tap-1-1212-0" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div><p></p> <p><strong>Bài toán: </strong>Trong bể có ... con cá, thả thêm ... con cá. Hỏi trong bể có tất cả bao nhiêu con cá?</p> <h3 id="3">3.</h3> <p>a) Tổ em có 6 bạn, sau đó có thêm 3 bạn nữa. Hỏi tổ em có tất cả mấy bạn?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/1302-1664797293.png.webp" alt="hinh-anh-luyen-tap-1-1212-1" title="hinh-anh-luyen-tap-1-1212-1" loading="lazy"></p> <p><strong>Phép tính:</strong></p> <p><img src="/uploads/tinymce/1303-1664797309.png.webp" width="259" height="70" alt="hinh-anh-luyen-tap-1-1212-2" title="hinh-anh-luyen-tap-1-1212-2" loading="lazy"></p> <p><strong>Trả lời:</strong></p> <p>Tổ em có tất cả ... bạn.</p> <p>b) Lúc đầu trên sân có 5 bạn đang chơi, sau đó 1 bạn đi về. Hỏi trên sân còn lại mấy bạn?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/1311-1664797542.png.webp" alt="hinh-anh-luyen-tap-1-1212-3" title="hinh-anh-luyen-tap-1-1212-3" loading="lazy"></p> <p><strong>Phép tính:</strong></p> <p><img src="/uploads/tinymce/1312-1664797557.png.webp" width="256" height="70" alt="hinh-anh-luyen-tap-1-1212-4" title="hinh-anh-luyen-tap-1-1212-4" loading="lazy"></p> <p><strong>Trả lời:</strong></p> <p>Trên sân còn lại ... bạn.</p> <h3 id="4">4.</h3> <p>Một xe ô tô buýt có 18 người trên xe, khi đến điểm dừng 4 người xuống xe. Hỏi trên xe còn lại bao nhiêu người?</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/1313-1664797600.png.webp" alt="hinh-anh-luyen-tap-1-1212-5" title="hinh-anh-luyen-tap-1-1212-5" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div><p></p> <p><strong>Phép tính:</strong></p> <p><strong><img src="/uploads/tinymce/1314-1664797658.png.webp" width="258" height="63" alt="hinh-anh-luyen-tap-1-1212-6" title="hinh-anh-luyen-tap-1-1212-6" loading="lazy"></strong></p> <p><strong>Trả lời:</strong></p> <p>Trên xe còn lại ... người.</p>