1樓:匿名使用者
5/7+1/4-9/14
=27/28-9/14
=9/28
2樓:匿名使用者
解:5/7+1/4-9/14
=10/14-9/14+1/4
=1/14+1/4
=2/28+7/28
=9/28
遞等式計算,寫出必要的計算過程,能簡便計算的用簡便方法計算:(1)7.06×2.4-5.7 (2)5.4×99+5.4
3樓:百度使用者
(1)7.06×
2.4-5.7,
=16.944-5.7,
=11.244;
(2)5.4×99+5.4,
=5.4×(99+1),
=5.4×100,
=540;
(3)9.6×72+9.6×28,
=9.6×(72+28),
=9.6×100,
=960;
(4)(1.25×2.5)×4,
=1.25×(2.5×4),
=1.25×10,
=12.5;
(5)10.4+72×0.81,
=10.4+58.32,
=68.72;
(6)11×0.6×0.4,
=6.6×0.4,
=2.64;
(7)(12.8+4.99)÷0.2,
=17.79÷0.2,
=88.95;
(8)1.25×8+2.5×4.4,
=10+2.5×0.4×11,
=10+11,
=21.
用遞等式計算,寫出必要的計算過程,能簡便運算的要用簡便方法計算.100-870÷29-8815÷7.5+4.6-6.63.5×
4樓:桃兒
1100-870÷
29-88
=100-30-88
=-18
215÷7.5+4.6-6.6
=2+4.6-6.6
=6.6-6.6
=033.5×
64×12.5
=(3.5×8)×內(8×12.5)
=28×100
=2800
4容51×7.5-49×7.5-1
=(51-49)×7.5-1
=2×7.5-1
=15-1
=1454×(4.8+3.2÷4-5.6)=4×(4.8+0.8-5.6)
=4×0
=06[8+(5-2)÷1.2]×5
=[8+3÷1.2]×5
=10.5×5
=52.5
用遞等式計算寫出必要的計算過程,能簡便計算的要簡便計算(1)28×105+7236÷18(2)4.5-3.15+0.5×8(3
5樓:匿名使用者
(1)28×105+7236÷18
=2940+402
=3342
(2)4.5-3.15+0.5×8
=4.5-3.15+4
=5.35
(3)8.5×5.3+3.7×8.5+8.5=8.5×(
5.3+3.7+1)
=8.5×10
=85(4)(0.7+1.7)×15-36=2.4×15-36
=36-36=0
遞等式計算(能簡算的要簡算)9 6 0
1 9.6 0.4 0.25,24 0.25,6 2 29.7 5.85 0.65 29.7 9,3.3 3 7.4 9.9,7.4 10 0.1 7.4 10 7.4 0.1,74 0.74,73.26 4 3.84 2.7 0.64,3.84 1.728,2.112 5 8.68 8.68 0....
遞等式計算(能簡算的要簡便運算,遞等式計算(能簡算的要簡便運算) 15 68 (7 78 4 32) 2 32 0 25 3 2 1 25 9 99 1
15.68 7.78 4.32 2.32,15.68 7.78 4.32 2.32,15.68 4.32 7.78 2.32 20 10,10 0.25 3.2 1.25,0.25 4 0.8 1.25,0.25 4 0.8 1.25 1 1,1 9.99 1.01,10 0.01 1.01,10....
計算。(能簡算的要簡算)脫式計算 能簡算的要簡算
1 3.6 8 17 17分之3乘3 3.6 8 17 9 17 3.6 17 17 3.6 1 2.6 2 3又11分之3 1又4分之3 3又11分之3 36 11 7 4 36 11 36 11 4 7 11 36 4 7 3 125 125 8 8 0 1 8 8 0 4 8又5分之4乘8又9...