问题
解答题
脱式计算.
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答案
(1)75+25×4
=75+100
=175;
(2)800-24×5
=800-120
=680;
(3)(15+35)×6
=50×6
=300;
(4)5×18×7
=90×7
=630;
(5)125×8×7
=1000×7
=7000;
(6)36÷9×12
=4×12
=48;
(7)16×5-8
=80-8
=72;
(8)(350-45)×7
=305×7
=2135.