能简算的要简算。 9-4.8÷6×50.5 (1.4×0.3+2.46)÷1.8 (2.5 ÷2+2÷2.5)×0.4
3.71+3.71×7.4-8.4×3.711.2+8.8×1.2516.2÷[64.8-(51.3-2.7)]急急急,注意能简算的一定要简算!过程一定要详细!!!!~~...
3.71+3.71×7.4-8.4×3.71 1.2+8.8×1.25 16.2÷[64.8-(51.3-2.7)] 急急急,注意能简算的一定要简算
!过程一定要详细!!!!~~~ 展开
!过程一定要详细!!!!~~~ 展开
3个回答
2012-04-25
展开全部
3.71+3.71X7.4-8.4X3.71
=3.71X1+3.71X7.4-8.4X3.71
=3.71X(1+8.4-7.4)
=3.71X2
=7.42
1.2+8.8×1.25
=1.2+(8+0.8)x1.25
=1.2+(8x1.25+0.8x1.25)
=1.2+(10+1)
=12.2
16.2÷[64.8-(51.3-2.7)]
=16.2÷(64.8-51.3+2.7)
=16.2÷16.2
=1
=3.71X1+3.71X7.4-8.4X3.71
=3.71X(1+8.4-7.4)
=3.71X2
=7.42
1.2+8.8×1.25
=1.2+(8+0.8)x1.25
=1.2+(8x1.25+0.8x1.25)
=1.2+(10+1)
=12.2
16.2÷[64.8-(51.3-2.7)]
=16.2÷(64.8-51.3+2.7)
=16.2÷16.2
=1
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