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1/2 2/3×括号3/4%1/6括号除以7/9脱式计算

7/9÷2/3+2/9 =7/9×3/2+2/9 =7/6+2/9 =21/18+4/18 =25/18

(九又2/7-7又2/9)÷(5/9+5/9) =2又63分之4÷10/9 =130/63×9/10 =13/7 =1又7分之6

你好,很高兴为你解答 2/7×9/2×7/9,,这样脱式计算 =9/7x7/9 =1 满意采纳哦!

80/72

1.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92) 3.(23/4-3/4)*(3*6+2) 4. 3/7 × 49/9 - 4/3 5. 8/9 × 15/36 + 1/27 6. 12× 5/6 – 2/9 ×3 7. 8× 5/4 + 1/4 8. 6÷ 3/8 – 3/8 ÷6 9. 4/7 × 5/9 + 3/7 × 5/9 10. 5/2 -( 3/2 + 4/5 ) 11. 7/8 + (...

(-1-1/4×8/9)÷7/9 =(-1×9/7)-(1/4×9/7)×(8/9×9/7) =-9/7-9/28×8/7 =-36/28-9/28×8/7 =-36/28-36/98 =-63/49-18/49 =-81/49

直接用通分法即可: 原式=(3/8+1/4)+3/7-2/9 =(3+2)/8+3/7-2/9 =5/8+3/7-2/9 根据7,8,9最小公倍数是7×8×9=504 =(5×63+3×72-2×56)/504=419/504

脱式计算 (3/4+1/6)*2/3 =3/4*2/3+1/6*2/3 =1/2+1/9 =11/18 25*1/5-5*1/5 =5-1 =4 6/11*7/15*10 =84/33 =28/11 (1/7+1/4)*28 =1/7*28+1/4*28 =4+7 =11 (21+2/5)*5/7 =21*5/7+2/5*5/7 =15+2/7 =15又2/7 39*7/13*2/3 =14

1/2÷4/5+﹙3/8-2/9﹚ =5/8+﹙3/8-2/9﹚ =5/8+3/8-2/9 =1-2/9 =7/9,等于9分之7

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