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用简便方法计算.0.65×101-0.658.16÷0.125÷804.3×1.73+1.28×4.3.
题目详情
用简便方法计算.
0.65×101-0.65
8.16÷0.125÷80
4.3×1.73+1.28×4.3.
0.65×101-0.65
8.16÷0.125÷80
4.3×1.73+1.28×4.3.
▼优质解答
答案和解析
①0.65×101-0.65
=0.65×(101-1)
=0.65×100
=65
②8.16÷0.125÷80
=8.16÷(0.125×80)
=8.16÷10
=0.816
③4.3×1.73+1.28×4.3
=4.3×(1.73+1.28)
=4.3×3.01
=4.3×(3+0.01)
=12.9+0.043
=12.943
=0.65×(101-1)
=0.65×100
=65
②8.16÷0.125÷80
=8.16÷(0.125×80)
=8.16÷10
=0.816
③4.3×1.73+1.28×4.3
=4.3×(1.73+1.28)
=4.3×3.01
=4.3×(3+0.01)
=12.9+0.043
=12.943
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