1樓:歡歡喜喜
脫式計算是乙個數學學科術語,即遞等式計算,把計算過程完整寫出來的運算,也就是脫離豎式的計算。
(1)(1/2+5/6-1/3)÷5/12=(3/6+5/6-2/6)÷5/12
=(8/6-2/6)÷5/12
=1÷5/12
=1×12/5
=12/5
=2.4。
(2)1.2×0.8×4×9
=0.96×4×9
=(1-0.04)x36
=1x36-0.04x36
=36-1.44
=34.56。
=34.56
2樓:匿名使用者
(1/2+5/6-1/3)÷5/12
=(3/6+5/6-2/6)÷5/12
=(8/6-2/6)÷5/12
=1÷5/12
=1×12/5
=12/5
=2又2/5
1.2×0.8×4×9
=0.96×4×9
=3.84×9
=34.56
3樓:獵鷹
(1/2+5/6-1/3)÷5/12
=(1/2+5/6-1/3)×12/5
=1/2×12/5+5/6×12/5-1/3×12/5=6/5+2-4/5
=6/5-4/5+2
=2.4
脫式計算:3/8÷(1-5/12-1/12),(2/5+3/7)ⅹ3.5? 20
4樓:樂為人師
3/8÷(1-5/12-1/12)
=3/8÷(7/12-1/12)
=3/8÷1/2
=3/4
(2/5+3/7)ⅹ3.5
=2/5ⅹ3.5+3/7ⅹ3.5
=1.4+1.5
=2.9
3/4÷(3/5-3/5x1/3)
=3/4÷(3/5-1/5)
=3/4÷2/5
=15/8
5樓:匿名使用者
解題過程和結果請開啟圖
6樓:平凡人生底蘊
=3/8÷6/12
=3/8ⅹ2
=3/4
=2/5x3.5+3/7×3.5
=1.4+1.5
=2.9
7樓:匿名使用者
3/8÷(1-5/12-1/12)
=3/8÷(7/12-1/12)
=3/8÷6/12
=3/8×12/6
=3/4
(2/5+3/7)×3.5
=(14/35+15/35)×3.5
=29/35×3.5
=2.9
8樓:匿名使用者
好難啊我不會(θˍθ=)請原諒?
脫式計算(能簡算的要簡算)4.36×12.5×8;15.2÷0.25÷4;0.
9樓:胤胤胤
(bai1)4.36×du12.5×8
=4.36×(12.5×8)
=4.36×100
=436;
(zhi2)15.2÷dao0.25÷4
=15.2÷(
0.25×4)
=15.2÷1
=15.2;
(3)0.46×1.9+0.54×1.9
=(0.46+0.54)×
內1.9
=1×1.9
=1.9;
(4)3.6÷[(1.2-0.4)×0.5]=3.6÷[0.8×0.5]
=3.6÷0.4
=9.容
10樓:匿名使用者
先算12.5*8=100*4.36=436
15.2/0.25/4=15.2*(0.25*4)=12.5
1/6+1/3×9/15,脫式計算。(3/8+5/12)x24,脫式計算。35除以[(11/6-2
11樓:瀛洲煙雨
1/6+1/3×
9/15
=1/6+1/15
=5/30+2/30
=7/30
(3/8+5/12)x24
=3/8*24+5/12*24
=9+10
=1935除以[(11/6-2/3)]x24=35÷5/6×24
=42×24
=1008
(4/3-3/5)除以3/4
=(20/15-9/15)÷3/4
=11/15×4/3
=44/45
5x4/5除以5x4/5
=(5÷5)×(4/5×4/5)
=1×16/25
=16/25
(8/15-9/20)除以(3/4+1/8)=(32/60-27/60)÷(6/8+1/8)=1/12÷7/8
=2/21
脫式計算(能簡算的要簡算) 2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9×4.8 [113-(34.15+3
12樓:誒呀
(1)2.5×7.1×4,
=(2.5×4)×7.1,
=10×7.1,
=71;
(2)16.12×99+16.12,
=16.12×(99+1),
=16.12×100,
=1612;
(3)5.2×0.9+0.9×4.8,
=0.9×(5.2+4.8),
=0.9×10,
=9;(4)[113-(34.15+38.25)]÷2,=[113-72.4]÷2,
=40.6÷2,
=20.3;
(5)3.6÷(1.2+0.6)×0.5,=3.6÷1.8×0.5,
=2×0.5,
=1;(6)4.82÷0.25+1.25÷0.25,=4.82×4+1.25×4,
=19.28+5,
=24.28.
7/12÷括號1/2+2/3括號乘2/5用遞等式計算,能簡算的要簡算
13樓:匿名使用者
7/12÷括號1/2+2/3括號乘2/5
=7/12÷(3/6+4/6)x2/5
=7/12÷7/6x2/5
=7/12x6/7x2/5
=1/2x2/5
=1/5
脫式計算,能簡算的要簡算,脫式計算能簡算的,要簡算25加13乘以1589乘
原式 5 9 5 9 3 8 3 8 1 3 8 3 8 9 64 1 8 5 9 3 8 2 9脫式計算過程。1 8 5 9 3 8 2 9脫式計算過程。1 8 3 8 5 9 2 9 1 4 7 9 9 36 28 36 37 36 1 8 3 8 5 9 2 9 4 8 7 9 1 2 7 9...
脫式計算(能簡算的要簡算),脫式計算 (能簡算的要簡算)1840 725 25 16
1 1840 725 25 16,1840 29 16,1840 30 1 16,1840 30 16 16,1360 16,1376 2 278?8 17?917,278 817 917 27 8?1,198 238 3 16.4 3.5 83.6 166.5,16.4 83.6 3.5 166....
脫式計算能簡算的要簡算
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