能简算的要简算:(1)432×99-568(2)14 2 9 ÷4-(3+5÷9)(3)51×68×78÷(17×34×13
能简算的要简算:(1)432×99-568(2)1429÷4-(3+5÷9)(3)51×68×78÷(17×34×13)(4)1417×(223-0.75)+1512÷1...
能简算的要简算:(1)432×99-568(2)14 2 9 ÷4-(3+5÷9)(3)51×68×78÷(17×34×13)(4)1 4 17 ×(2 2 3 -0.75)+15 1 2 ÷ 17 21 .
展开
泪畅来6970
推荐于2016-03-27
·
TA获得超过108个赞
关注
(1)432×99-568 =432×(100-1)-568, =432×100-432-568, =43200-(432+568), =43200-1000, =42200;
(2)14 ÷4-(3+5÷9) = × -(3+ ), = - , =0;
(3)51×68×78÷(17×34×13) =51×68×78÷17÷34÷13, =(51÷17)×(68÷34)×(78÷13), =3×2×6, =36;
(4)1 ×(2 -0.75)+15 ÷ . = × ( - )+ × , = × + × , =( + )× , =( + )× , = × , = . |
收起
为你推荐: