5.28+8点64-2.8+4点2-3.24-1点9+4.2等于多少脱式计算?
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答:5.28+8.64-2.8+4.2-3.24-1.9+4.2
=5.28+8.64+4.2+4.2-(2.8+3.24+1.9)
=5.28+8.64+8.4-(6.04+1.9)
=5.28+17.04-(7.04+0.9)
=5.28-0.9+(17.04-7.04)
=4.38+10
=14.38
=5.28+8.64+4.2+4.2-(2.8+3.24+1.9)
=5.28+8.64+8.4-(6.04+1.9)
=5.28+17.04-(7.04+0.9)
=5.28-0.9+(17.04-7.04)
=4.38+10
=14.38
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脱式计算:
5.28+8.64-2.8+4.2-3.24-1.9+4.2
=(5.28+8.64+4.2+4.2)-(2.8+3.24+1.9)
=22.32-7.94
=14.38
5.28+8.64-2.8+4.2-3.24-1.9+4.2
=(5.28+8.64+4.2+4.2)-(2.8+3.24+1.9)
=22.32-7.94
=14.38
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5.28+8.64-2.8+4.2-3.24-1.9+4.2
=14.92-2.8+4.2-3.24-1.9+4.2
=12.12+4.2-3.24-1.9+4.2
=16.32-3.24-1.9+4.2
=13.08-1.9+4.2
=11.18+4.2
=15.38
=14.92-2.8+4.2-3.24-1.9+4.2
=12.12+4.2-3.24-1.9+4.2
=16.32-3.24-1.9+4.2
=13.08-1.9+4.2
=11.18+4.2
=15.38
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