题目内容
计算下面各题.
90÷(3.6-1.8)
(6.9-3.15)÷O.3×0.8
3.4×7.8÷3.9
7.4×1.5÷0.3-3.7.
90÷(3.6-1.8)
(6.9-3.15)÷O.3×0.8
3.4×7.8÷3.9
7.4×1.5÷0.3-3.7.
(1)90÷(3.6-1.8),
=90÷1.8,
=50;
(2)(6.9-3.15)÷O.3×0.8,
=3.75÷0.3×0.8,
=12.5×0.8,
=10;
(3)3.4×7.8÷3.9,
=3.4×(7.8÷3.9),
=3.4×2,
=6.8;
(4)7.4×1.5÷0.3-3.7,
=7.4×(1.5÷0.3)-3.7,
=7.4×5-3.7,
=37-3.7,
=33.3.
=90÷1.8,
=50;
(2)(6.9-3.15)÷O.3×0.8,
=3.75÷0.3×0.8,
=12.5×0.8,
=10;
(3)3.4×7.8÷3.9,
=3.4×(7.8÷3.9),
=3.4×2,
=6.8;
(4)7.4×1.5÷0.3-3.7,
=7.4×(1.5÷0.3)-3.7,
=7.4×5-3.7,
=37-3.7,
=33.3.
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