题目内容
脱式计算.
500-29×20
(10000-9190)÷90
210×7÷10
(63-24)×144.
500-29×20
(10000-9190)÷90
210×7÷10
(63-24)×144.
分析:(1)先算乘法,再算减法;
(2)先算减法,再算除法;
(3)先算乘法,再算除法;
(4)先算减法,再算乘法.
(2)先算减法,再算除法;
(3)先算乘法,再算除法;
(4)先算减法,再算乘法.
解答:解:(1)500-29×20
=500-580
=-80;
(2)(10000-9190)÷90
=810÷90
=9;
(3)210×7÷10
=1470÷10
=147;
(4)(63-24)×144
=39×144
=5616.
=500-580
=-80;
(2)(10000-9190)÷90
=810÷90
=9;
(3)210×7÷10
=1470÷10
=147;
(4)(63-24)×144
=39×144
=5616.
点评:此题主要考查整数的四则混合运算的运算顺序,然后再根据运算顺序进行计算.
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