请教几道小学六年级数学题呃…写出步骤77x(9/55-9/77)0.4x(3.2-0.8)÷1.2(7/8-5/16)x(5/9+2/3)3.6÷1.2+0.5x54/5x2/3+1/5÷3/4
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![请教几道小学六年级数学题呃…写出步骤77x(9/55-9/77)0.4x(3.2-0.8)÷1.2(7/8-5/16)x(5/9+2/3)3.6÷1.2+0.5x54/5x2/3+1/5÷3/4](/uploads/image/z/348539-59-9.jpg?t=%E8%AF%B7%E6%95%99%E5%87%A0%E9%81%93%E5%B0%8F%E5%AD%A6%E5%85%AD%E5%B9%B4%E7%BA%A7%E6%95%B0%E5%AD%A6%E9%A2%98%E5%91%83%E2%80%A6%E5%86%99%E5%87%BA%E6%AD%A5%E9%AA%A477x%289%2F55-9%2F77%290.4x%283.2-0.8%29%C3%B71.2%287%2F8-5%2F16%29x%285%2F9%2B2%2F3%293.6%C3%B71.2%2B0.5x54%2F5x2%2F3%2B1%2F5%C3%B73%2F4)
请教几道小学六年级数学题呃…写出步骤77x(9/55-9/77)0.4x(3.2-0.8)÷1.2(7/8-5/16)x(5/9+2/3)3.6÷1.2+0.5x54/5x2/3+1/5÷3/4
请教几道小学六年级数学题
呃…写出步骤
77x(9/55-9/77)
0.4x(3.2-0.8)÷1.2
(7/8-5/16)x(5/9+2/3)
3.6÷1.2+0.5x5
4/5x2/3+1/5÷3/4
请教几道小学六年级数学题呃…写出步骤77x(9/55-9/77)0.4x(3.2-0.8)÷1.2(7/8-5/16)x(5/9+2/3)3.6÷1.2+0.5x54/5x2/3+1/5÷3/4
77x(9/55-9/77)
=77x9/55-77x9/77
=7x9/5-9
=9x7/5-9
=9x(7/5-1)
=9x2/5
=18/5
0.4x(3.2-0.8)÷1.2
=0.4x2.4÷1.2
=0.4x2x1.2÷1.2
=0.8
(7/8-5/16)x(5/9+2/3)
=﹙14/16-5/16﹚×﹙5/9+6/9﹚
=9/16×11/9
=11/16
3.6÷1.2+0.5x5
=3+2.5
=5.5
4/5x2/3+1/5÷3/4
=8/15+1/5x4/3
=8/15+4/15
=12/15
=4/5
77x(9/55-9/77)=7*9/5-9=12.6-9=3.6
0.4x(3.2-0.8)÷1.2=0.4*2.4÷1.2=0.4
(7/8-5/16)x(5/9+2/3)=(14/16-5/16)(5/9+6/9)=(9/16)(11/9)=11/16
3.6÷1.2+0.5x5=3+2.5=5.5
4/5x2/3+1/5÷3/4=8/15+4/15=12/15=4/5
1,77x(9/55-9/77)=7x(9/5-9/7)=7x9x2/35=18/5。
2,0.4x(3.2-0.8)÷1.2=0.4x2.4/1.2=0.4x2=0.8.
3,(7/8-5/16)x(5/9+2/3)=9/16x11/9=11/16.
4,3.6÷1.2+0.5x5=3+2.5=5.5.
5,4/5x2/3+1/5÷3/4=8/15+4/15=12/15=4/5.
77x(9/55-9/77)=77x(1/5-1/7)x9/11=7x9x(7/35-5/35)=7x9x2/35=18/5
0.4x(3.2-0.8)÷1.2=0.4x2.4/1.2=0.4x2=0.8
(7/8-5/16)x(5/9+2/3)=(14/16-5/16)x(5/9+6/9)=(9/16)x(11/9)=11/16
3.6÷1.2+0.5x5=3+2,5=5.5
4/5x2/3+1/5÷3/4=8/15+4/15=12/15=4/5
1,
77 × (9/55-9/77)
= 77 × 9/55-77 × 9/77
= 7 × 9/5-9
= 9 × 7/5-9
= 9 × (7/5-1)
= 9 × 2/5
= 18/5
2,
0.4 × (3.2-0.8)÷1.2
= 0.4 × 2.4÷1.2
= 0.4 × 2 × 1.2÷1.2<...
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1,
77 × (9/55-9/77)
= 77 × 9/55-77 × 9/77
= 7 × 9/5-9
= 9 × 7/5-9
= 9 × (7/5-1)
= 9 × 2/5
= 18/5
2,
0.4 × (3.2-0.8)÷1.2
= 0.4 × 2.4÷1.2
= 0.4 × 2 × 1.2÷1.2
= 0.8
3,
(7/8-5/16) × (5/9+2/3)
=(14/16-5/16﹚ × ﹙5/9 + 6/9﹚
= 9/16 × 11/9
= 11/16
4,
3.6÷1.2+0.5 × 5
= 3 + 2.5
= 5.5
5,
4/5 × 2/3+1/5÷3/4
= 8/15 + 1/5 × 4/3
= 8/15 + 4/15
= 12/15
= 4/5
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