题目内容
递等式计算.
(1)55×5+55 | (2)300-297÷3 | (3)(300-297)÷3 | (4)763+27×8 |
(5)612×(54÷9) | (6)58×9-221 | (7)(48+808)÷8 | (8)430÷5×6. |
考点:整数四则混合运算
专题:计算题
分析:(1)先算乘法,再算加法;
(2)先算除法,再算减法;
(3)先算减法,再算除法;
(4)先算乘法,再算加法;
(5)先算除法,再算乘法;
(6)先算乘法,再算减法;
(7)先算加法,再算除法;
(8)按照从左向右的顺序进行计算.
(2)先算除法,再算减法;
(3)先算减法,再算除法;
(4)先算乘法,再算加法;
(5)先算除法,再算乘法;
(6)先算乘法,再算减法;
(7)先算加法,再算除法;
(8)按照从左向右的顺序进行计算.
解答:
解:(1)55×5+55
=275+55
=330;
(2)300-297÷3
=300-99
=201;
(3)(300-297)÷3
=3÷3
=1;
(4)763+27×8
=763+216
=979;
(5)612×(54÷9)
=612×6
=3672;
(6)58×9-221
=522-221
=301;
(7)(48+808)÷8
=856÷8
=107;
(8)430÷5×6
=86×6
=516.
=275+55
=330;
(2)300-297÷3
=300-99
=201;
(3)(300-297)÷3
=3÷3
=1;
(4)763+27×8
=763+216
=979;
(5)612×(54÷9)
=612×6
=3672;
(6)58×9-221
=522-221
=301;
(7)(48+808)÷8
=856÷8
=107;
(8)430÷5×6
=86×6
=516.
点评:考查了再算四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
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