用递等式计算(能简算的要简算) 23÷[412÷(16+34)] 817÷23+123×917 152×5.7+5.9×7.5-1
用递等式计算(能简算的要简算)23÷[412÷(16+34)]817÷23+123×917152×5.7+5.9×7.5-1.6×7128.15-2.93-1.07-3....
用递等式计算(能简算的要简算) 23÷[412÷(16+34)] 817÷23+123×917 152×5.7+5.9×7.5-1.6×712 8.15-2.93-1.07-3.15.
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(1)
2 |
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12 |
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=
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=
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=
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6 |
(2)
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23 |
9 |
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=
8 |
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23 |
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23 |
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=(
8 |
17 |
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23 |
=1×
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=
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(3)
15 |
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=7.5×5.7+5.9×7.5-1.6×7.5,
=7.5×(5.7+5.9-1.6),
=7.5×10,
=75;
(4)8.15-2.93-1.07-3.15,
=(8.15-3.15)-(2.93+1.07),
=5-4,
=1.
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