0.125x.32x2.5
5/11除8加1/8x6/11
1.9x201
2/3x28减19除3/2
0.125×32×2.5
=0.125×8×4×2.5
=(0.125×8)×(4×2.5)
=1×10
=10
5/11÷8+1/8×6/11
=5/11×1/8+1/8×6/11
=(5/11+6/11)×1/8
=1×1/8
=1/8
1.9×201
=1.9×(200+1)
=1.9×200+1.9×1
=380+1.9
=381.9
2/3×28-19÷3/2
=2/3×28-19×2/3
=2/3×(28-19)
=2/3×9
=6
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=0.125×8×4×2.5
=(0.125×8)×(4×2.5)
=1×10
=10
5/11÷8+1/8×6/11
=5/11×1/8+1/8×6/11
=(5/11+6/11)×1/8
=1×1/8
=1/8
1.9×201
=1.9×(200+1)
=1.9×200+1.9×1
=380+1.9
=381.9
2/3×28-19÷3/2
=2/3×28-19×2/3
=2/3×(28-19)
=2/3×9
=6
很高兴为您解答，祝你学习进步！如果有其他问题请另发或点击向我求助，请谅解，谢谢！
有不明白的可以追问！如果您认可我的回答。请点击下面的【选为满意回答】按钮。来自：求助得到的回答
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第1个回答 2013-04-21
0.125x32x2.5
=0.125*8*4*2.5
=1*10
=10
5/11除8加1/8x6/11
=5/11*1/8+1/8*1/6
=1/8*(5/11+1/6)
=1/8*(30+11)/66
=43/528
1.9x201
=19*21
=(20-1)(20+1)
=400-1
=399
2/3x28减19除3/2
=2/3*(28-19）
=2*9/3*
=6 .
=0.125*8*4*2.5
=1*10
=10
5/11除8加1/8x6/11
=5/11*1/8+1/8*1/6
=1/8*(5/11+1/6)
=1/8*(30+11)/66
=43/528
1.9x201
=19*21
=(20-1)(20+1)
=400-1
=399
2/3x28减19除3/2
=2/3*(28-19）
=2*9/3*
=6 .
