问题
解答题
用你喜欢的方法计算下面各题.
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答案
(1)0.125×88,
=0.125×(80+8),
=0.125×80+0.125×8,
=10+1,
=11;
(2)88-7.5+12-2.5,
=(88+12)-(7.5+2.5),
=100-10,
=90;
(3)555×9+111×55,
=(111×5)×9+111×55,
=111×(5×9)+111×55,
=111×(45+55),
=111×100,
=11100;
(4)
-7 8
+5 6
,7 12
=
-21 24
+20 24
,14 24
=
;5 8
(5)168.1÷(4.3×2-0.4),
=168.1÷(8.6-0.4),
=168.1÷8.2,
=20.5;
(6)
÷[(3 8
-5 6
)×3],2 3
=
÷[(3 8
-5 6
)×3],4 6
=
÷3 8
,1 2
=
.3 4