文档介绍：① 876+645 =③ 45 ×9= ② 500 - 345 = ④ 48 ÷ 4=⑤ 67 ×7=⑥ 456 ÷9≈⑦ 490 ÷5≈⑧ 459 ÷8≈⑨ 769 - 368= ⑩ 56 ÷8× 12= ⑾ 800 - 54 ÷ 9=⑿ 328 - 24 × 5= ⒀ 36 ÷ 3+65= ⒁ 69+69 ÷ 3= ⒃ 586 - 678 ×0÷ 9= ⒂ 69 - 69 ÷ 3= ⒄ 70 -0÷ 3+70= ① 457+357 =③ 89 ×6= ② 400 - 278 = ④ 24 ÷ 2=⑤ 59 ×9=⑥ 468 ÷9≈⑦ 587 ÷6≈⑧ 4500 ÷8≈⑨ 600 - 368= ⑩ 72 ÷9× 9= ⑾ 612 - 99 ÷ 9=⑿ 1328 - 125 × 8= ⒀ 81 ÷ 9+65= ⒁ 0+69 ÷ 3= ⒃ 689 - 998 ×0÷ 8= ⒂ 56 - 56 ÷ 7= ⒄ 50 -0÷ 9+70= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ⒁ 69 - 69 ÷ 3= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ⒁ 69 - 69 ÷ 3= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ⒁ 69 - 69 ÷ 3= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ⒁ 69 - 69 ÷ 3= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ⒁ 69 - 69 ÷ 3= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ⒁ 69 - 69 ÷ 3= ①+=③× = ②-= ④÷ 2=⑤× 9=⑥÷ 9≈⑦÷ 6≈⑧÷ 8≈⑨-= ⑩÷ 9×= ⑾-÷=⑿- 125 × 8= ⒀÷ += ⒁ 0+ ÷= ⒃-×0÷ 8= ⒂-÷ 7= ⒄-0÷+= ⒁ 69 - 69 ÷ 3=