六年级数学100道脱式计算带过程带答案 急急急 !!!
六年级数学100道脱式计算带过程带答案急急急 !!!谢谢!
推荐回答(5个)
1、1.25×(8+10)
=1.25×8+1.25×10
=10+12.5
=22.5
2、1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78
3、1/2-(4/5-1/2)
=1/2+1/2-4/5
=1-4/5
=1/5
4、4800÷25÷4
=4800÷(25x4)
=4800÷100
=4800÷100
=48
5、2/5-(3/8-3/5)
=2/5+3/5-3/8
=1-3/8
=5/8
6、3/4-(3/7-1/4)
=3/4+1/4-3/7
=1-3/7
=4/7
7、3.2x0.125x2.5
=0.125x8x(0.4x2.5)
=1x1
=1
8、0.4×125×25×0.8
=(0.4×25)×(125×0.8)
=10×100
=1000
9、1.25×(8+10)
=1.25×8+1.25×10
=10+12.5
=22.5
10、9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
一、6÷3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
二、4/7 ×5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
三、5/2 -( 3/2 + 4/5 )
=5/2-3/2-4/5
=1-4/5
=1/5
四、6 ×( 1/2 + 2/3 )
=6x1/2+6x2/3
=3+4
=7
五、8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
六、31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
七、4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
八、101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16
九、解比例:
8 : x = 24 : 15 x : 0.15 = 3.6 : 910 1.2x = 45
2.4 : 135 = 12 : x 110 : x = 0.2 : 14 3.6 : 15 = x : 2212
十、简便运算:
① 4×127 +4×29 + 57 ×4 ② 567+98 ③ 213 ×12.5×67 ×8 ④ 127 - 56 - 16
⑤ 2178 ÷7 ⑥ (13 + 15 )×45 ⑦ 0.4×7+0.4×3
扩展资料:
在四则运算中,加法和减法叫做第一级运算,乘法和除法叫做第二级运算。含有两种或两种以上的运算的算式,通常称为混合运算。加、减、乘、除的混合运算也叫做四则混合运算。在四则混合运算中,规定的计算先后次序,称为运算顺序。数学上规定的四则运算顺序如下:
(1)同级运算在一个算式中,如果只含有同级运算,应当按照从左到右的次序进行运算。这就是说,只含有加减法,或者只含有乘除法的混合运算,它们的运算顺序是从左到右依次计算。
(2)一至二级运算
在一个算式中,如果既含有第一级运算又含有第二级运算,那么,应先算第二级运算,后算第一级运算。即“先算乘法和除法,后算加法和减法”,简称“先乘除,后加减”。
参考资料来源:百度百科-脱式计算
六年级数学脱式计算带过程带答案 急急急
1.6÷ 3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
2.4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3.5/2 -( 3/2 + 4/5 )
=5/2-3/2-4/5
=1-4/5
=1/5
4.6 ×( 1/2 + 2/3 )
=6x1/2+6x2/3
=3+4
=7
5.8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6.31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7.4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8.101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16
1.6÷ 3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
2.4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3.5/2 -( 3/2 + 4/5 )
=5/2-3/2-4/5
=1-4/5
=1/5
4.6 ×( 1/2 + 2/3 )
=6x1/2+6x2/3
=3+4
=7
5.8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6.31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7.4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8.101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16
点赞,谢谢
1.6÷ 3/8 – 3/8 ÷6 =1/6x(3/8-3/8) =1/6x0 =0 2.4/7 × 5/9 + 3/7 × 5/9 =(4/7+3/7)x5/9 =1x5/9 =5/9 3.5/2 -( 3/2 + 4/5 ) =5/2-3/2-4/5 =1-4/5 =1/5 4.6 ×( 1/2 + 2/3 ) =6x1/2+6x2/3 =3+4 =7 5.8 × 4/5 + 8 × 11/5 =8x(4/5+11/5) =8x3 =24 6.31 × 5/6 – 5/6 =(31-1)x5/6 =30x5/6 =25 7.4/5 × 25/16 + 2/3 × 3/4 =5/4+1/21.6÷ 3/8 – 3/8 ÷6 =1/6x(3/8-3/8) =1/6x0 =0 2.4/7 × 5/9 + 3/7 × 5/9 =(4/7+3/7)x5/9 =1x5/9 =5/9 3.5/2 -( 3/2 + 4/5 ) =5/2-3/2-4/5 =1-4/5 =1/5 4.6 ×( 1/2 + 2/3 ) =6x1/2+6x2/3 =3+4 =7 5.8 × 4/5 + 8 × 11/5 =8x(4/5+11/5) =8x3 =24 6.31 × 5/6 – 5/6 =(31-1)x5/6 =30x5/6 =25 7.4/5 × 25/16 + 2/3 × 3/4 =5/4+1/2
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