题目内容
脱式计算数我棒.
12.8+2.04×9.5
0.6×(4.2-0.8)-0.45.
12.8+2.04×9.5
0.6×(4.2-0.8)-0.45.
(1)12.8+2.04×9.5
=12.8+19.38
=32.18;
(2)0.6×(4.2-0.8)-0.45
=0.6×3.4-0.45
=2.04-0.45
=1.59.
=12.8+19.38
=32.18;
(2)0.6×(4.2-0.8)-0.45
=0.6×3.4-0.45
=2.04-0.45
=1.59.
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