看谁算得准:
①3×3-3=________ | ②36-12-18=________ | ③________-12=18 |
④5+10=8+________ | ⑤2×4×5=________ | ⑥________-6=________. |
用竖式计算
263×9= | 608+392=验算 | 62÷3=验算. |
①3×3-3=________ | ②36-12-18=________ | ③________-12=18 |
④5+10=8+________ | ⑤2×4×5=________ | ⑥________-6=________. |
263×9= | 608+392=验算 | 62÷3=验算. |