简便计算:1:21x(9.3-3.7)-5.6 2:2.3x16+231:21x(9.3-3.7)-5.62:2.3x16+23x23+2.3

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简便计算:1:21x(9.3-3.7)-5.62:2.3x16+231:21x(9.3-3.7)-5.62:2.3x16+23x23+2.3简便计算:1:21x(9.3-3.7)-5.62:2.3x1

简便计算:1:21x(9.3-3.7)-5.6 2:2.3x16+231:21x(9.3-3.7)-5.62:2.3x16+23x23+2.3
简便计算:1:21x(9.3-3.7)-5.6 2:2.3x16+23
1:21x(9.3-3.7)-5.6
2:2.3x16+23x23+2.3

简便计算:1:21x(9.3-3.7)-5.6 2:2.3x16+231:21x(9.3-3.7)-5.62:2.3x16+23x23+2.3
1.原式=21×5.6-5.6
=(21-1)×5.6
=20×5.6
=112
2.原式=2.3×16+2.3×23+2.3
=2.3×(16+23+1)
=2.3×40
=92

1:21×(9.3-3.3-0.4)-5.6=21×6-21×0.4-5.6=126-8.4-5.6=126-14=112
2:2.3×17+2.3×230=2.3×247=2.3×250-2.3×3=23×25-6.9=24×25-25-6.9=600-25-6.9=568.1