0.125x.32x2.5
5/11除8加1/8x6/11
1.9x201
2/3x28减19除3/2
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0.125x.32x2.5=0.125×8×(4×2.5)=1×10=10
5/11÷8+1/8x6/11=5/11×1/8+1/8×6/11=(5/11+6/11)×1/8=1/8
1.9x201=1.9×200+1.9=381.9
第四个已经做过了来自:求助得到的回答
0.125x.32x2.5=0.125×8×(4×2.5)=1×10=10
5/11÷8+1/8x6/11=5/11×1/8+1/8×6/11=(5/11+6/11)×1/8=1/8
1.9x201=1.9×200+1.9=381.9
第四个已经做过了来自:求助得到的回答
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第1个回答 2013-04-21
2/21(2/3 +3 / 7)除以
= 2÷(2/3×21 +3 / 7×21)
= 2÷(14 +9)
= 2/23
3/8 * 11/6-1/2除以3 = 33/8 * 1/6-1/6
=(33/8-1 )* 1/6
= 25/8 * 1/6
= 25/48
18 *(1/3 +6除以12/7)
= 18 * (1/3 7/2)
= 18 * 1/3 18 * 7/2
= 6 63
= 69
7 * 5/49 3 / 14
= 5/7 +3 / 14
= 10/14 +3 / 14
= 13/14
103 * 4/5
=(100 + 3)* 4/5
= 100 * 4/5 +3 * 4/5
= 80 +2.4
= 82.4
= 2÷(2/3×21 +3 / 7×21)
= 2÷(14 +9)
= 2/23
3/8 * 11/6-1/2除以3 = 33/8 * 1/6-1/6
=(33/8-1 )* 1/6
= 25/8 * 1/6
= 25/48
18 *(1/3 +6除以12/7)
= 18 * (1/3 7/2)
= 18 * 1/3 18 * 7/2
= 6 63
= 69
7 * 5/49 3 / 14
= 5/7 +3 / 14
= 10/14 +3 / 14
= 13/14
103 * 4/5
=(100 + 3)* 4/5
= 100 * 4/5 +3 * 4/5
= 80 +2.4
= 82.4