问题
解答题
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答案
(1)236+199,
=236+200-1,
=436-1,
=435;
(2)5800÷29=200;
(3)(32+28)×5,
=50×5,
=300;
(4)323-299,
=323-300+1,
=24;
(5)150÷5=30;
(6)100+100÷4,
=100+25,
=125;
(7)31×6=186;
(8)6300÷300=21;
(9)90-90÷6,
=90-15,
=75.