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递等式计算(能简便计算的要简便):(1)5787-329-1071 (2)52×11+11×18(3)72÷2×5(4)65+65÷5
递等式计算(能简便计算的要简便):(1)5787-329-1071(2)52×11+11×18(3)72÷2×5(4)65+65÷5(5)912-512+88....
递等式计算(能简便计算的要简便):(1)5787-329-1071 (2)52×11+11×18(3)72÷2×5(4)65+65÷5(5)912-512+88.
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(1)5787-329-1071,
=5787-(329+1071),
=5787-1400,
=4387;
(2)52×11+11×18,
=(52+18)×11,
=70×11,
=770;
(3)72÷2×5,
=36×5,
=180;
(4)65+65÷5,
=65+13,
=78;
(5)912-512+88,
=400+88,
=488.
=5787-(329+1071),
=5787-1400,
=4387;
(2)52×11+11×18,
=(52+18)×11,
=70×11,
=770;
(3)72÷2×5,
=36×5,
=180;
(4)65+65÷5,
=65+13,
=78;
(5)912-512+88,
=400+88,
=488.
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