问题
解答题
脱式计算.
500-29×20
(10000-9190)÷90
210×7÷10
(63-24)×144.
答案
(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.
脱式计算.
500-29×20
(10000-9190)÷90
210×7÷10
(63-24)×144.
(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.