题目内容
递等式计算:
(1)2×1.4+2×1.6
(2)30.9÷[14-(9.85+1.15)].
(1)2×1.4+2×1.6
(2)30.9÷[14-(9.85+1.15)].
(1)2×1.4+2×1.6,
=2×(1.4+1.6),
=2×3,
=6,
(2)30.9÷[14-(9.85+1.15)],
=30.9÷(14-11),
=30.9÷3,
=10.3.
=2×(1.4+1.6),
=2×3,
=6,
(2)30.9÷[14-(9.85+1.15)],
=30.9÷(14-11),
=30.9÷3,
=10.3.
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